Broomfield
Carbide Gauges Ltd.

Obsolete Specifications

Tolerances: New Gauges

Tolerances: Used Gauges

Old Specifications

Set Compositions: Metric

Set Compositions: Imperial

Tolerances for New Gauge Blocks
BS4311: PART1: 1993 (obsolete)

Metric

Nominal Length Tolerances of deviation of measured central length from nominal at 20oC Maximum associated uncertainty of measurement Tolerances on variation of measured length
Greater than Less than or equal to Grade
K & 0 1 2 K 0, 1 & 2 K 0 1 2
Unit (mm) Unit 0.001mm (1µm)
0 10 ±0.12 ±0.25 ±0.50 ±0.03 ±0.08 0.05 0.10 0.16 0.30
10 25 ±0.15 ±0.30 ±0.60 ±0.04 ±0.10 0.05 0.10 0.16 0.30
25 50 ±0.20 ±0.40 ±0.80 ±0.06 ±0.12 0.06 0.10 0.18 0.30
50 75 ±0.25 ±0.50 ±1.00 ±0.07 ±0.15 0.06 0.12 0.18 0.35
75 100 ±0.30 ±0.60 ±1.20 ±0.09 ±0.18 0.07 0.12 0.20 0.35


Flatness tolerances for new metric gauge blocks
Grade K 0 1 2
Tolerance (µm) 0.05 0.10 0.15 0.25




Inch

Nominal Length Tolerances of deviation of measured central length from nominal at 20oC Maximum associated uncertainty of measurement Tolerances on variation of measured length
Greater than Less than or equal to Grade
K & 0 1 2 K 0, 1 & 2 K 0 1 2
Unit (in) Unit 0.001 in (1µin)
0 0.4 ±5 ±10 ±20 ±1 ±3 2 4 6 12
0.4 1 ±6 ±12 ±25 ±1.5 ±4 2 4 6 12
1 2 ±8 ±15 ±30 ±2.5 ±5 3 4 7 12
2 3 ±10 ±20 ±40 ±3 ±6 3 5 7 14
3 4 ±12 ±25 ±50 ±3.5 ±7 3 5 8 14


Flatness tolerances for new inch gauge blocks
Grade K 0 1 2
Tolerance (µin) 2 3 6 10




Tolerances for New Gauge Blocks
DIN861: PART1: January 1980 (obsolete)

Nominal Length Unit = 0.01 µm (0.00001mm)
Grade 00 Grade 0 Grade 1 Grade 2 Calibration Grade K
Over
mm
Up to and including Permissible deviations from nominal length Tolerance on variation Permissible deviations from nominal length Tolerance on variation Permissible deviations from nominal length Tolerance on variation Permissible deviations from nominal length Tolerance on variation Permissible deviations from nominal length Tolerance on variation
- 10 ±6 5 ±12 10 ±20 16 ±45 30 ±20 5
10 25 ±7  5 ±14 10 ±30 16 ±60 30 ±30 5
25 50 ±10 6 ±20 10 ±40 18 ±80 30 ±40 6
50 75 ±12 6 ±25 12 ±50 18 ±100 35 ±50 6
75 100 ±14 7 ±30 12 ±60 20 ±120 35 ±60 7



UKAS Certification
0103

Broomfield Carbide Gauges Ltd., Brigg Mills, 3 The Cobbles, Meltham, Holmfirth HD9 5QQ
Tel: +44 (0) 1484 665599        Fax: +44 (0) 844 5046692        e-mail: enquiry@broomfieldgauges.com

Gauge and Tool Makers Association