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Calibration Weights
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Manufacturers
Rice Lake Calibration Weights
Rice Lake Calibration Weights and Scales

Rice Lake Weighing Systems is an international leader in the manufacture and distribution of weight-related products and process-control equipment. Within this ISO 9001 registered company, progressive new technologies merge with the wisdom of industry experience and create the future of weighing through cutting-edge research and design. More about Rice Lake
Rice Lake Calibration Weights > Rice Lake Scales
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Calibration Weights by Class

All Class F Weights are now at Class 5 Standards

Beginning January 1, 2020, Rice Lake Class F calibration weights will no longer be sold for legal metrology use. According to the newly updated NIST Handbook 105-1 (2019), new weights for use as field standards placed into service for weights and measures use after this date must comply with all of the requirements of NIST Handbook 105-1 (2019). In order to update our Class F inventory to bring it more in line with ASTM and OIML tolerances, all Rice Lake NIST Class F weights will become ASTM Class 5 weights. Part numbers and pricing will remain the same, but the tolerance will be tighter.

Note that existing NIST Class F calibration weights in the field are grandfathered in and may continue to be used for legal metrology use, but they must meet NIST Handbook 105-1 (1990) requirements. Although the new revision does supersede the 1990 version, it makes clear that existing Class F weights may continue to be used.

While existing NIST Class F calibration weights may be reclassified to one of the new specifications if all specifications and tolerances fully comply with the alternative standard, the NIST Office of Weights and Measures strongly recommends that you do not reclassify existing Class F weights due to the difficulty of performing compliance evaluation.

This change is taking place to accommodate for the increasing accuracy of weighing devices used for legal metrology. Class F weights are no longer sufficient for the calibration, inspection, or sealing of weighing devices used for the jewelry, marijuana and pharmaceutical industries. Similarly, hydrogen for hydrogen vehicles is being sold by weight, which demands a high level of accuracy.

Class 0

Individual &
Weight Sets
Class 0

Class 0 Used as a primary reference for calibrating other reference standards and weights. Class 0 weights are intended to be used in metrology laboratories where the stability of the environment and careful handling are assured. Although very stable, one-piece construction Class 0 weights have no method of adjustment and are not suitable for general laboratory use. The uncertainty is guaranteed to be 1/3 the tolerance.

Class 1

Individual &
Weight Sets
Class 1

Class 1 - Can be used as a reference standard in calibrating other weights and is appropriate for calibrating high-precision analytical balances with a readability as low as 0.1 mg to 0.01 mg.

Class 2

Individual &
Weight Sets
Class 2

Class 2 - Appropriate for calibrating high-precision top loading balances with a readability as low as 0.01 g to 0.001 g.

Class 3

Individual &
Weight Sets
Class 3

Class 3 - Appropriate for calibrating high-precision top loading balances with a readability as low as 0.01 g to 0.001 g.

Class 4

Individual &
Weight Sets
Class 4

Class 4 - For calibration of semi-analytical balances and for student use..

Specialty Weights

Individual &
Weight Sets
Class 6

Class 6 - For rough weighing operations in physical and chemical laboratories, such as force ..

Specialty Weights

Individual &
Weight Sets
Class 7

Class 7 - For rough weighing operations in physical and chemical laboratories, such as force ..

Class F

Individual &
Weight Sets
Class F
Now Class 5

Class F - Now Class 5 - Primarily used to test commercial weighing devices by state and local weights and measures, device installers, and service technicians.



Class E1

Individual
Weight Sets
Class E1

OIML Class E1 Weights manufactured to international recommendation, OIML R111 specifications would be used to calibrate Class I/II balances, balances accurate as 0.001mg, and as a laboratory standard. These classes are considered to be of extra-fine accuracy.

Class E2

Individual
Weight Sets
Class E2

OIML Class E2 Weights manufactured to international recommendation, OIML R111 specifications would be used to calibrate Class I/II balances, balances accurate as 0.001mg, and as a laboratory standard. These classes are considered to be of extra-fine accuracy.

Class F1

Individual
Weight Sets
Class F1

OIML Class F1 Suitable for use for traceability of OIML class F2 weights and lower; also with OIML accuracy class I weighing instruments. The maximum permissible error from nominal value at 1 kg is ±5 mg. For the calibration of high accuracy class 2 balances.

Class F2

Individual
Weight Sets
Class F2

OIML Class F2 Suitable for use for traceability of OIML class M1 weights and lower; also with OIML accuracy class II weighing instruments. Intended for use in high value commercial transactions such as gold and precious stones. The maximum permissible error from nominal value at 1 kg is ±16 mg. Used as working standards for precision and analytical work, build-in weights, external weights to calibrate moderate precision balance

Class M1

Individual
Weight Sets
Class M1

OIML Class M1 Suitable for use for traceability of OIML class M2 weights and lower; also with OIML accuracy class II weighing instruments. The maximum permissible error from nominal value at 1 kg is ±50 mg.

Class M2

Individual
Class M2

OIML Class M2 Suitable for use for traceability of OIML class M3 weights; also with OIML accuracy class III weighing instruments. Intended for use in normal commercial transactions where goods are sold by weight. The maximum permissible error from nominal value at 1 kg is ±160 mg. Used for accuracy class III applications, industrial scales, dial scales, trip balances, platform scales

Calibration Weights by Type

Grip-handle
Grip-handle

Cylindrical
Cylindrical

Screw-knob
Screw-knob

Leaf
Leaf

Specialty
Specialty

Specialty
Weight Sets






Rice Lake Scales
Dimension Scale
Dimensional Scales		 Industrial Scales
Industrial Scales 		Floor Scales Scales
Floor Scales 		Laboratory Scales
Laboratory Scales 		Retail Scales
Retail Scales 		Shipping Scales
Shipping Scales 		Pallet Jack Scales
Pallet Jack Scales 		Wheel Weighing Scales
Wheel Weighing Scales 		Indicators
Indicators
Physician Scales
Body Composition		 Physician Scales
Physician Scales		 Wheelchair
Wheelchair		 Bariatric
Bariatric		 Bariatric
Chair		 Bariatric
Baby		 Specialty Medical
Specialty Medical		 Hanging Scale
Luggage Scale







Class 0 - Calibration Weights

ANSI/ASTM E617 Class 0
1 mg - 50 kg

Metric
Class 0

20 g - 5 kg Class 0 Essential Sets
2 g - 5 g

Essential Sets
Class 0

500 mg Leaf Precision Laboratory Metric Sets
500 mg

Weight Sets
Class 0

20g Class 0 set
20g

Weight Sets
Class 0

50g Class 0 set
50g

Weight Sets
Class 0

100g Class 0 set
100g

Weight Sets
Class 0

200g Class 0 set
200g

Weight Sets
Class 0

500 g Class 0 set
500g

Weight Sets
Class 0

1 kg Class 0 sets
1 kg

Weight Sets
Class 0

2 kg Class 0 set
2 kg

Weight Sets
Class 0

5 kg Class 0 set
5 kg

Weight Sets
Class 0

10 kg Class 0 set
10 kg

Weight Sets
Class 0

20 kg Class 0 set
20 kg

Weight Sets
Class 0

Class 0 Used as a primary reference for calibrating other reference standards and weights. Class 0 weights are intended to be used in metrology laboratories where the stability of the environment and careful handling are assured. Although very stable, one-piece construction Class 0 weights have no method of adjustment and are not suitable for general laboratory use. The uncertainty is guaranteed to be 1/3 the tolerance.




Class 1 - Calibration Weights

ANSI/ASTM E617 Class 0
0.05 lb - 10 lb

Avoirdupois
Class 1

500 mg Leaf Precision Laboratory Metric Sets
10 lb - 50 lb

Avoirdupois
Class 1

1/32 oz - 50 lb Class 1 Avoirdupois
1/32 oz - 50 lb

Avoirdupois
Class 1

10 g - 5 kg Class 1 Metric
10 g - 5 kg

Metric
Class 1

5 kg - 30 kg Class 1 Metric
5 kg - 30 kg

Metric
Class 1

0.5 mg - 50 kg Class 1 Metric
0.5 mg - 50 kg

Metric
Class 1

2 lb - 50 lb Class 1 Avoirdupois Weight Sets
2 lb - 50 lb

Weight Sets
Class 1

20 g - 5 kg Class 1 Essential Sets
20 g - 5 kg

Essential Sets
Class 1

500 mg Leaf Precision Laboratory Class 1 Metric Sets
500 mg

Weight Sets
Class 1

20g Class 1 Weight Sets
20g

Weight Sets
Class 1

50g Class 1 Weight Sets
50g

Weight Sets
Class 1

100g Class 1 Weight Sets
100g

Weight Sets
Class 1

200g Class 1 Weight Sets
200g

Weight Sets
Class 1

300 - 500 g Class 1 Weight Sets
300g - 500g

Weight Sets
Class 1

1 kg Class 1 Weight Sets
1 kg

Weight Sets
Class 1

2 kg Class 1 Weight Sets
2 kg

Weight Sets
Class 1

5 kg Class 1 Weight Sets
5 kg

Weight Sets
Class 1

10 kg Class 1 Weight Sets
10 kg

Weight Sets
Class 1

20 kg Class 1 Weight Sets
20 kg

Weight Sets
Class 1

Class 1 - Can be used as a reference standard in calibrating other weights and is appropriate for calibrating high-precision analytical balances with a readability as low as 0.1 mg to 0.01 mg.




Class 2 - Calibration Weights

0.05 lb - 10 lb Individual Class 2
0.05 lb - 10 lb

Avoirdupois
Class 2

10 lb - 50 lb Individual Class 2
10 lb - 50 lb

Avoirdupois
Class 2

1/32 oz - 50 lb Class 2 Avoirdupois
1/32 oz - 50 lb

Avoirdupois
Class 2

10 g - 5 kg Class 2 Metric
10 g - 5 kg

Metric
Class 2

5 kg - 30 kg Class 2 Metric
5 kg - 30 kg

Metric
Class 2

0.5 mg - 50 kg Class 2 Metric
0.5 mg - 50 kg

Metric
Class 2

2 lb - 50 lb Class 2 Avoirdupois Weight Sets
2 lb - 50 lb

Weight Sets
Class 2

500 mg Leaf Precision Laboratory Class 2 Metric Sets
500 mg

Weight Sets
Class 2

20g Class 2 Weight Sets
20g

Weight Sets
Class 2

50g Class 2 Weight Sets
50g

Weight Sets
Class 2

100g Class 2 Weight Sets
100g

Weight Sets
Class 2

200g Class 2 Weight Sets
200g

Weight Sets
Class 2

300 - 500 g Class 2 Weight Sets
300g - 500g

Weight Sets
Class 2

1 kg Class 2 Weight Sets
1 kg

Weight Sets
Class 2

2 kg Class 2 Weight Sets
2 kg

Weight Sets
Class 2

5 kg Class 2 Weight Sets
5 kg

Weight Sets
Class 2

10 kg Class 2 Weight Sets
10 kg

Weight Sets
Class 2

20 kg Class 2 Weight Sets
20 kg

Weight Sets
Class 2

Class 2 - Appropriate for calibrating high-precision top loading balances with a readability as low as 0.01 g to 0.001 g.




Class 3 - Calibration Weights

0.05 lb - 10 lb Individual Class 3
0.05 lb - 10 lb

Avoirdupois
Class 3

10 lb - 50 lb Individual Class 3
10 lb - 50 lb

Avoirdupois
Class 3

1/32 oz - 50 lb Class 3 Avoirdupois
1/32 oz - 50 lb

Avoirdupois
Class 3

10 g - 5 kg Class 3 Metric
10 g - 5 kg

Metric
Class 3

5 kg - 30 kg Class 3 Metric
5 kg - 30 kg

Metric
Class 3

0.5 mg - 50 kg Class 3 Metric
0.5 mg - 50 kg

Metric
Class 3

2 lb - 50 lb Class 3 Avoirdupois Weight Sets
2 lb - 50 lb

Weight Sets
Class 3

500 mg Leaf Precision Laboratory Class 3 Metric Sets
500 mg

Weight Sets
Class 3

20g Class 3 Weight Sets
20g

Weight Sets
Class 3

50g Class 3 Weight Sets
50g

Weight Sets
Class 3

100g Class 3 Weight Sets
100g

Weight Sets
Class 3

200g Class 3 Weight Sets
200g

Weight Sets
Class 3

300 - 500 g Class 3 Weight Sets
300g - 500g

Weight Sets
Class 3

1 kg Class 3 Weight Sets
1 kg

Weight Sets
Class 3

2 kg Class 3 Weight Sets
2 kg

Weight Sets
Class 3

5 kg Class 3 Weight Sets
5 kg

Weight Sets
Class 3

10 kg Class 3 Weight Sets
10 kg

Weight Sets
Class 3

20 kg Class 3 Weight Sets
20 kg

Weight Sets
Class 3

Class 3 - Appropriate for calibrating high-precision top loading balances with a readability as low as 0.01 g to 0.001 g.




Class 4 - Calibration Weights

0.05 lb - 10 lb Individual Class 4
0.05 lb - 10 lb

Avoirdupois
Class 4

10 lb - 50 lb Individual Class 4
10 lb - 50 lb

Avoirdupois
Class 4

1/32 oz - 50 lb Class 4 Avoirdupois
1/32 oz - 50 lb

Avoirdupois
Class 4

10 g - 5 kg Class 4 Metric
10 g - 5 kg

Metric
Class 4

5 kg - 30 kg Class 4 Metric
5 kg - 30 kg

Metric
Class 4

0.5 mg - 50 kg Class 4 Metric
0.5 mg - 50 kg

Metric
Class 4

2 lb - 50 lb Class 4 Avoirdupois Weight Sets
2 lb - 50 lb

Weight Sets
Class 4

500 mg Leaf Precision Laboratory Class 4 Metric Sets
500 mg

Weight Sets
Class 4

20g Class 4 Weight Sets
20g

Weight Sets
Class 4

50g Class 4 Weight Sets
50g

Weight Sets
Class 4

100g Class 4 Weight Sets
100g

Weight Sets
Class 4

200g Class 4 Weight Sets
200g

Weight Sets
Class 4

300 - 500 g Class 4 Weight Sets
300g - 500g

Weight Sets
Class 4

1 kg Class 4 Weight Sets
1 kg

Weight Sets
Class 4

2 kg Class 4 Weight Sets
2 kg

Weight Sets
Class 4

5 kg Class 4 Weight Sets
5 kg

Weight Sets
Class 4

10 kg Class 4 Weight Sets
10 kg

Weight Sets
Class 4

20 kg Class 4 Weight Sets
20 kg

Weight Sets
Class 4

Class 4 - For calibration of semi-analytical balances and for student use..




Class 5 - Class F - Calibration Weights

0.01 lb - 10 lb Individual Class F
0.01 lb - 10 lb

Avoirdupois
Class 5
Class F

10 lb - 50 lb Individual Class F
10 lb - 50 lb

Avoirdupois
Class 5
Class F

1 mg - 5 kg Class F Metric
1 mg - 5 kg

Metric
Class 5
Class F

5 kg - 30 kg Class F Metric
5 kg - 30 kg

Metric
Class 5
Class F

0.2 lb - 0.3 lb - 4 oz Class F Avoirdupois Weight Sets
0.2 lb, 0.3 lb, 4oz

Weight Sets
Class 5
Class F

1 lb Class F Avoirdupois Sets
1 lb

Weight Sets
Class 5
Class F

2 lb Class F Avoirdupois Sets
2 lb

Weight Sets
Class 5
Class F

5 lb Class F Avoirdupois Sets
5 lb

Weight Sets
Class 5
Class F

10 lb Class F Avoirdupois Sets
10 lb

Weight Sets
Class 5
Class F

5g, 50 g, 100g Class F Avoirdupois Sets
5g - 50 g

Weight Sets
Class 5
Class F

5g, 50 g, 100g Class F Avoirdupois Sets
100g

Weight Sets
Class 5
Class F

500 g Class F Weight Sets
500 g

Weight Sets
Class 5
Class F

1 kg Class F Weight Sets
1 kg

Weight Sets
Class 5
Class F

2 kg Class F Weight Sets
2 kg

Weight Sets
Class 5
Class F

5 kg Class F Weight Sets
5 kg

Weight Sets
Class 5
Class F

Class 5 - Class F - Primarily used to test commercial weighing devices by state and local weights and measures, device installers, and service technicians. Note All Class F wieghts are now Class 5




Specialty Calibration Weights - Class 6 - Class 7 - Class F

20 lb - 3000 lb Class F Avoirdupois
20 lb - 3000 lb

Avoirdupois
Class 6
Class F

1000 lb - 2000 lb Avoirdupois Class F
1000 lb - 2000 lb

Avoirdupois
Class 6
Class F

10 kg - 1000 kg Class F Metric
10 kg - 1000 kg

Metric
Class 6
Class F

0.005ozt - 500 ozt Individual Troy Class F
0.005 - 500 ozt

Troy Ounce
Class F

0.1 - 20 dwt Penny Weights Individual Class F
0.1 - 20 dwt

Penny Weights
Class F

1 GN - 20 GN Grain Individual Class F
1 GN - 20 GN

Grain
Class F

2 oz - 2 lb Class F Avoirdupois
2 oz - 2 lb

Cube
Class F

100g - 1 kg Class F Avoirdupois
100g - 1 kg

Metric Cube
Class F

100g - 1 kg Class F Avoirdupois
300g - 2 lb

Cube Sets
Class F

1/4 oz - 5 lb Avoirdupois Class F
1/4 oz - 5 lb

Ring
Class F

25g - 500g Metric Class F
25g - 500g

Metric Ring
Class F

1000 lb - 2000 lb Class 6 Fork Lift
1000 lb - 2000 lb

Fork Lift
Class 6

5g, 50 g, 100g Class F Avoirdupois Sets
50 kg - 500 kg

Weight Cart
Class 6

STAINLESS STEEL DISH WEIGHTS
0.001 lb - 0.005 lb

Dish Weights
Class 6

1/32 oz - 50 lb Slotted Class 6 Avoirdupois Sets
1/32 oz - 50 lb

Hook
Class 6

1g - 25 kg Slotted Class 6 Metric Sets
1g - 25 kg

Metric Hook
Class 6

5 lb, 3 kg Class 7 Individual Hangers
5 lb, 3 kg
Individual Hangers
Class 7

4 oz - 10 lb Slotted Class F Avoirdupois Sets
4 oz - 10 lb Individual
Slotted
Class F

100 g - 5 kg Slotted Class F Metric Sets
100 g - 5 kg Individual
Metric Slotted
Class F

1 kg Class F Weight Sets
1 lb - 5 lb
Interlocking
Hangers
Class 7

1/2 lb - 100 lb Class 6,7 Interlocking Slotted
1/2 lb - 100 lb
Interlocking
Slotted
Class 6,7

500 g - 3 kg Interlocking Hangers Class 7
500 g - 3 kg
Interlocking
Metric Hangers
Class 7

200 g - 20 kg Class 6,7 Interlocking Slotted
200 g - 20 kg
Interlocking
Metric Slotted
Class 6,7

Counterpoise Weights

7 oz - 21 oz Fairbanks Hangers Class 7
7 oz - 21 oz

Fairbanks
Hangers
Class 7

50 lb - 1000 lb Fairbanks Round Class 7
50 lb - 1000 lb

Fairbanks
Round
Class 7

50 lb - 500 lb Fairbanks Square Class 7
50 lb - 500 lb

Fairbanks
Square
Class 7

10 kg - 200 kg Fairbanks Hexagon Class 7
10 kg - 200 kg

Fairbanks
Hexagon
Class 7

14 oz Toledo Hangers Class 7
14 oz

Toledo
Hangers
Class 7

100 lb - 500 lb Toledo Triangel Class 7
100 lb - 500 lb

Toledo
Triangel
Class 7

7 oz - 16 oz Howe Hangers Class 7
7 oz - 16 oz

Howe
Hangers
Class 7

2 lb - 500 lb oz Howe Round Class 7
2 lb - 500 lb

Howe
Round
Class 7

Class 6 - Class 7 - For rough weighing operations in physical and chemical laboratories, such as force ..




Class E1 - Calibration Weights

OIML Class E1 Individual Weights
1 mg - 20 kg

Metric
Class E1

50mg - 50g OIML Class E1 Weight Sets
50 mg - 50 g

Weight Sets
Class E1

100g OIML Class E1 Weight Sets
100 g

Weight Sets
Class E1

200g OIML Class E1 Weight Sets
200 g

Weight Sets
Class E1

500g OIML Class E1 Weight Sets
500 g

Weight Sets
Class E1

1kg OIML Class E1 Weight Sets
1 kg

Weight Sets
Class E1

2kg OIML Class E1 Weight Sets
2 kg

Weight Sets
Class E1

5kg OIML Class E1 Weight Sets
5 kg

Weight Sets
Class E1

OIML Class E1 Weights manufactured to international recommendation, OIML R111 specifications would be used to calibrate Class I/II balances, balances accurate as 0.001mg, and as a laboratory standard. These classes are considered to be of extra-fine accuracy.




Class E2 - Calibration Weights

OIML Class E2 Individual Weights
1 mg - 20 kg

Metric
Class E2

100g OIML Class E2 Weight Sets
50 mg - 50 g

Weight Sets
Class E2

100g OIML Class E2 Weight Sets
100 g

Weight Sets
Class E2

200g OIML Class E2 Weight Sets
200 g

Weight Sets
Class E2

500g OIML Class E2 Weight Sets
500 g

Weight Sets
Class E2

1kg OIML Class E2 Weight Sets
1 kg

Weight Sets
Class E2

2kg OIML Class E2 Weight Sets
2 kg

Weight Sets
Class E2

5kg OIML Class E2 Weight Sets
5 kg

Weight Sets
Class E2

5kg OIML Class F1 Weight Sets
10 kg

Weight Sets
Class F1

5kg OIML Class F1 Weight Sets
20 kg

Weight Sets
Class F1

OIML Class E2 Weights manufactured to international recommendation, OIML R111 specifications would be used to calibrate Class I/II balances, balances accurate as 0.001mg, and as a laboratory standard. These classes are considered to be of extra-fine accuracy.



Class F1 - Calibration Weights

OIML Class F1 Individual Weights
1 mg - 20 kg

Metric
Class F1

100g OIML Class F1 Weight Sets
50 mg - 50 g

Weight Sets
Class F1

100g OIML Class F1 Weight Sets
100 g

Weight Sets
Class F1

200g OIML Class F1 Weight Sets
200 g

Weight Sets
Class F1

500g OIML Class F1 Weight Sets
500 g

Weight Sets
Class F1

1kg OIML Class F1 Weight Sets
1 kg

Weight Sets
Class F1

2kg OIML Class F1 Weight Sets
2 kg

Weight Sets
Class F1

5kg OIML Class F1 Weight Sets
5 kg

Weight Sets
Class F1

5kg OIML Class F1 Weight Sets
10 kg

Weight Sets
Class F1

5kg OIML Class F1 Weight Sets
20 kg

Weight Sets
Class F1

OIML Class F1 Suitable for use for traceability of OIML class F2 weights and lower; also with OIML accuracy class I weighing instruments. The maximum permissible error from nominal value at 1 kg is ±5 mg. For the calibration of high accuracy class 2 balances.



Class F2 - Calibration Weights

OIML Class F2 Individual Weights
1 mg - 20 kg

Metric
Class F1

100g OIML Class F2 Weight Sets
50 mg - 50 g

Weight Sets
Class F2

100g OIML Class F2 Weight Sets
100 g

Weight Sets
Class F2

200g OIML Class F2 Weight Sets
200 g

Weight Sets
Class F2

500g OIML Class F2 Weight Sets
500 g

Weight Sets
Class F2

1kg OIML Class F2 Weight Sets
1 kg

Weight Sets
Class F2

2kg OIML Class F2 Weight Sets
2 kg

Weight Sets
Class F2

5kg OIML Class F2 Weight Sets
5 kg

Weight Sets
Class F2

5kg OIML Class F1 Weight Sets
10 kg

Weight Sets
Class F1

5kg OIML Class F1 Weight Sets
20 kg

Weight Sets
Class F1

OIML Class F2 Suitable for use for traceability of OIML class M1 weights and lower; also with OIML accuracy class II weighing instruments. Intended for use in high value commercial transactions such as gold and precious stones. The maximum permissible error from nominal value at 1 kg is ±16 mg. Used as working standards for precision and analytical work, build-in weights, external weights to calibrate moderate precision balance


Class M1 - Calibration Weights

OIML Class M1 Individual Weights
1 mg - 20 kg

Metric
Class M1

100g OIML Class E1 Weight Sets
50 mg - 50 g

Weight Sets
Class M1

100g OIML Class M1 Weight Sets
100 g

Weight Sets
Class M1

5kg OIML Class M1 Weight Sets
5 kg

Weight Sets
Class M1

OIML Class M1 Suitable for use for traceability of OIML class M2 weights and lower; also with OIML accuracy class II weighing instruments. The maximum permissible error from nominal value at 1 kg is ±50 mg.




Grip-handle, NIST, ASTM, and OIML Classification

Cast Iron Stainless Steel
CAST IRON GRIP HANDLE AND NESTING SLAB WEIGHTS
20 - 3000 lb
Class F		    CAST IRON GRIP HANDLE AND NESTING SLAB WEIGHTS
10 - 1000 kg
Class F		    CAST IRON GRIP HANDLE AND NESTING SLAB WEIGHTS
1 - 10 lb
Class 7		    CAST IRON GRIP HANDLE AND NESTING SLAB WEIGHTS
0.5 - 5 kg
Class 7		    CAST IRON GRIP HANDLE AND NESTING SLAB WEIGHTS
5g - 50 kg
Class M1		    Grip Handle Calibration Weights, ASTM Classification Class 1
10 - 50 lb
Class 1
Class 2
Class 3
Class 4
    Grip Handle Calibration Weights, ASTM Classification Class 1
5 - 30 kg
Class 1
Class 2
Class 3
Class 4 		   STAINLESS STEEL GRIP HANDLE WEIGHTS Class F
5g - 30 kg
Class F		    STAINLESS STEEL GRIP HANDLE WEIGHTS AVOIRDUPO
10 - 50 lb
Class F
Cylindrical, NIST, ASTM, and OIML Classification

Individual Kits
Cylindrical Calibration Weights, ASTM Classification Class 1
0.05 lb - 10 lb
Class 1
Class 2
Class 3
Class 4
    Rice Lake, ASTM Metric Class 1 Individual Calibration Weight
10 g - 5 kg
Class 1
Class 2
Class 3
Class 4 		   Rice Lake, 46083 ASTM Metric Class 0 Density 7.95 Individual Calibration Weight
1 g - 50 kg
Class 0
 Stainless Steel Individual Cylindrical
0.05 oz - 10 lb
Class F		    Stainless Steel Individual Cylindrical
1 g - 5kg
Class F		    Weight,CYL OIML M1 SST, Satin, Density 7.84
Class M1
Class M2		    Weight,CYL OIML M2 SST, Satin, Density 7.84
Class M1		    Weight Kit Class 1 ASTM SST Polished Density 7.84 Elec Bal Cal Wts
0.05 lb - 10lb
Class 1
Class 2
Class 3
Class 4
    Weight Kit Class 1 ASTM SST Polished Density 7.84 Elec Bal Cal Wts Metric
10 g - 5 kg
Class 1
Class 2
Class 3
Class 4 		   Weight Kit Class 0 ASTM SST Polished Density 7.84 Elec Bal Cal Wts Metric
1 g - 50 kg
Class 0
     

Sets
Stainless Steel 4 oz Sets
4oz Models		    Stainless Steel 1 lb Sets
1 lb Models		    Stainless Steel 2 lb Sets
2 lb Models		    Stainless Steel 5 lb Sets
5 lb Models		    Stainless Steel 10 lb Sets
10 lb Models		    Stainless Steel 50g Sets
50 g Models		    Stainless Steel 100g Sets
100 g Models		    Stainless Steel 500g Sets
500 g Models		    Stainless Steel 1000g Sets
1 kg Models		    Stainless Steel 2000g Sets
2 kg Models		    Stainless Steel 5000g Sets
5 kg Models
Screw-knob, ASTM Classification

Individual Kits Essential Sets Sets
Weight,Screw Knob ASTM Class 1 SST Polished Density 7.95
1/16oz - 50lb
Class 1
Class 2
Class 3
Class 4
    Weight,Leaf ASTM Class 0 SST
1g - 20kg
Class 1
Class 2
Class 3
Class 4 		   Weight Kit,Screw Knob ASTM Class 1 SST Polished Density 7.95
1/16oz - 30lb
Class 1
Class 2
Class 3
Class 4 		   Weight Kit,Screw Knob ASTM Class 1 SST Polished Density 7.95
1 g - 20 kg
Class 1
Class 2
Class 3
Class 4 		   Rice Lake ASTM Essential Weight Sets Screw Knob Class 1
Essential Class 1
    Weight Set, ASTM Class 1 SST Polished
2lb - 50lb
Class 1
Class 2
Class 3
Class 4


ASTM Sets
   Weight Set, ASTM Class 0 SST (5321)
500mg
Class 0
Class 1
Class 2
Class 3
Class 4 		   Weight Set, ASTM Class 0 SST Polished
20g
Class 0
Class 1
Class 2
Class 3
Class 4
    Weight Set, ASTM Class 1 SST Polished
50g
Class 0
Class 1
Class 2
Class 3
Class 4
    Weight Set, ASTM Class 1 SST Polished
100g
Class 0
Class 1
Class 2
Class 3
Class 4 		   Weight Set, ASTM Class 0 SST (5321)
200g
Class 0
Class 1
Class 2
Class 3
Class 4 		   Weight Set, ASTM Class 1 SST Polished
300g
Class 1
Class 2
Class 3
Class 4 		   Weight Set, ASTM Class 1 SST Polished
500g
Class 0
Class 1
Class 2
Class 3
Class 4 		   Weight Set, ASTM Class 0 SST (5321)
1kg
Class 0
Class 1
Class 2
Class 3
Class 4 		   Weight Set, ASTM Class 0 SST (5321)
2kg
Class 0
Class 1
Class 2
Class 3
Class 4 		   Weight Set, ASTM Class 0 SST (5321)
3kg-5kg
Class 0
Class 1
Class 2
Class 3
Class 4 		   Weight Set, ASTM Class 0 SST (5321)
10kg
Class 0
Class 1
Class 2
Class 3
Class 4 		   Weight Set, ASTM Class 0 SST (5321)
20kg-25kg
Class 0
Class 1
Class 2
Class 3
Class 4
Leaf Weights Stainless Steel, NIST,ASTM Classification

Individual Kits Sets
Stainless Steel Individual Leaf Weights
1 - 500 mg
Class F 		   Weight,Leaf ASTM Class 1 SST Polished Density 7.95
0.001 lb - 1/32 oz
Class 1
Class 2
Class 3
Class 4		    Weight,Leaf ASTM Class 1 SST Polished Density 7.95
1 - 500 mg
Class 0
Class 1
Class 2
Class 3
Class 4 		   Weight Kit,Leaf ASTM Class 4 SST Polished Density 7.95
1 - 500 mg
Class 0
Class 1
Class 2
Class 3
Class 4 		   Weight Kit,Leaf ASTM Class 4 SST Polished Density 7.95
0.001 lb - 1/32 oz
Class 1
Class 2
Class 3
Class 4		    Weight Set, ASTM Class 0 SST (5321)
500mg
Class 0
Class 1
Class 2
Class 3
Class 4
Specialty Weights

Metric Cube4
Cube
100g - 1000g
2 oz - 2 lb
Weight Sets 		   Metric Cube4
Ring
25g - 500g
1/4 oz - 5 lb
    Weight,Leaf Troy NIST Class F SST Satin Density 7.95
Troy Ounce
0.005 ozt - 500 ozt		    Weight,Leaf Pennyweight NIST Class F SST Satin Density 7.95
Pennyweight
0.1 dwt - 20 dwt		    Weight,Leaf Grain NIST Class F SST Satin Density 7.95
Grain
1 GN - 20 GN		    Weight,Slotted Slot Width NIST Class F SST Satin Density 7.84
Slotted
4 oz - 10 lb
100 g - 5 kg		    Stainless Steel Individual Dish
Dish
   CAST IRON GRIP HANDLE AND NESTING SLAB WEIGHTS
Nesting Slab
1000 - 2500 lb		    Lift Truck 1000 lb -2000 lb Class 6
Lift Truck
1000 - 2000 lb		    Clean Room Weight Cart Class 6
Weight Cart
50 - 500 kg

Slotted CAST IRON Interlocking Weights
CAST IRON Slotted Interlocking Weights Hangers
500 g - 2 kg
Hangers		    CAST IRON Slotted Interlocking Wts
200 g - 20 kg
Slotted Interlocking		    CAST IRON Slotted Interlocking Weights Hangers
1 - 5 lb
Hangers		    CAST IRON Slotted Interlocking Wts
1/2 - 100 lb
Slotted Interlocking
Counterpoise Weights
METRIC HANGER WEIGHTS
Fairbanks Hangers		    METRIC HEXAGON WEIGHTS
Fairbanks Hexagon		    AVOIRDUPOIS FAIRBANKS INTERLOCKING WEIGHTS
Fairbanks Square		    CAVOIRDUPOIS ROUND INTERLOCKING WEIGHTS
Fairbanks Round		    TOLEDO TRIANGLE HANGER
Toledo Hangers		    TOLEDO TRIANGLE WEIGHTS
Toledo Triangular		    HOWE ROUND HANGER WEIGHTS
Howe Hangers		    HOWE ROUND INDIVIDUAL WEIGHTS
Howe Triangular

Individual - Hook Weights
Weight,Hook ASTM Class 6 SST Satin Density 7.84
Avoirdupois
1/32 oz - 50 lb		    Weight,Hook ASTM Class 6 SST Satin Density 7.84
Metric
1 g - 25 kg







Rice Lake

 URice Lake Calibration Weights

About Rice Lake

Rice Lake Weighing Systems is an international leader in the manufacture and distribution of weight-related products and process-control equipment. Within this ISO 9001 registered company, progressive new technologies merge with the wisdom of industry experience and create the future of weighing through cutting-edge research and design.

There roots are planted firmly in the principles of quality and customer service. Through three generations of family ownership these ideals remain unchanged. Today, Rice Lake Weighing Systems is world renowned for delivering the highest standard of product and the best service in the weighing industry.

Rice Lake will continue there dedication to being the best by every measure, from community involvement to global commitment, and the promotion of ethical business practices that represent the values of our customers, our employees and our company

Rice Lake Company History

1940s In 1946, Donald B. Johnson and Warren Thomas opened the doors of Thomas & Johnson Scale Service in Saint Paul. The doors they opened were the garage doors belonging to Donald's father-in-law. In 1948, Thomas & Johnson Scale moved to Rice Lake, Wisconsin where there was a growing demand for scale service from creameries and cheese processing enterprises. Their founding principal remains the same today: "Take care of the customer and the rest of the business will take care of itself."

1950s In the late 1950s, scale dealers were in dire need of scale repair parts. Donald B. fostered the idea of refinishing old pivots and bearings so customers would not have to wait for new parts to be manufactured. He purchased a large quantity of WWII ammunition boxes and sent them to people he met at national scale conferences, offering to refinish any scale parts sent back in the ammunition boxes for fifty cents apiece. They were guaranteed a two- to three-day turnaround. Soon, word of this new approach to solving the parts shortage problem spread throughout the country.

1960s Thomas & Johnson published their first Pivot & Bearing Catalog displaying eighteen sizes of pivots and bearings and advertising a 35 percent savings compared to the same parts offered by the original manufacturer.

Donald B. opened his first National Conference hospitality suite. He welcomed everyone to the suite and treated them to Wisconsin cheese and sausage. Donald B.'s hospitality suite became a tradition at the National Conference and continues to be a welcoming destination today.

1970s In 1971 Thomas & Johnson Scale Service became Rice Lake Bearing, Inc.

In the mid 1970s, Donald B. saw that the United States was considering conversion to all metric measurements and realized his scale distributors would need new metric counterpoise weights. Always staying ahead of the curve, he began including test weights in the company repertoire. With an advanced metrology lab and expertise in the field, the company became a major supplier of precision test weights and recalibration.

1980s In 1981, Donald B. and his son, Mark Johnson, Sr., became the sole owners of Rice Lake Bearing.

During the 1980's, the Johnsons built on their company's position as a parts supplier to the weighing industry by including electronic parts and components in their catalog. They felt the same commitment made to the mechanical scale business should be made to the electronic scale industry. "Service, selection and speed" became a slogan the entire industry welcomed and depended on critical parts and components. In 1986, Rice Lake Bearing became Rice Lake Weighing Systems and strong application and engineering support set the bar for the entire industry.

1990s Rice Lake Weighing Systems became a world leader in weight related technology serving a wide spectrum of industries; Bulk Construction Materials, Chemical, Food & Beverage Processing, Timber, Pulp & Paper, Manufacturing, Packaging & Material Handling, Pharmaceuticals, Retail, Supply Chain Management, Transport & Logistics, Utilities & Waste. Rice Lake products and technology covered applications from basic weighing and data collection to on-line scale diagnostics and real-time monitoring, from recipe formulation to traceability systems, from truck management to inventory management, and beyond.

In 1996, Donald B. was awarded the prestigious Woody Woodland Memorial Award for his contribution to the scale industry.

2000 Rice Lake now offers over 35,000 weighing, control, data collection and communication products with over 1,000,000 items in stock and available for same- or next-day delivery.

Additional products manufactured and/or distributed by Rice Lake include the highest quality bench, crane, counting, and floor scales, remote displays, balances, printers, junction boxes and hardware.

Today Rice Lake Weighing Systems continues to lead the way in the development of new weighing and process control technologies. Rice Lake's corporate headquarters, metrology laboratory and main manufacturing plant remain in Rice Lake, Wisconsin, employing more than 400 employees. Additional manufacturing facilities are located in Jasper, Alabama, and Newtown, Connecticut.

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