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Precision Plug and Ring Taper Gages

Features:

  • Ease-of-use, which provides fast (yes or no) dimensional information that rarely calls for human judgment
  • Portable and independent of power, which means they can be used anywhere in the shop without additional equipment
  • Allows for accurate alignment between spindle tools and their supporting members
  • Provides information as to whether more contact is required to drive a tool

There are a number of standards that define taper shank dimensions, and Locher, Inc. can provide taper gages to meet the criteria for many of them as well as designing gages for custom applications.

Morse Taper
These types of shanks are used on a variety of tools, and exclusively on the shanks of twist drills. The taper for this standard is approximately 0.625 inch per foot, in most cases.

Morse Taper

Table 1. Morse Standard Taper Shanks

No. of Taper Taper per Foot Taper per Inch Small End of Plug D Diameter End of Socket A Shank Depth of Hole H
          Length B Depth S  
0 0.62460 0.05205 0.252 0.3561 2 11/32 2 7/32 2 1/32
1 0.59858 0.04988 0.369 0.475 2 9/16 2 7/16 2 5/32
2 0.59941 0.04995 0.572 0.700 3 1/8 2 15/16 2 39/64
3 0.60235 0.05019 0.778 0.938 3 7/8 3 11/16 3 1/4
4 0.62326 0.05193 1.020 1.231 4 7/8 4 5/8 4 1/8
5 0.63151 0.05262 1.475 1.748 6 1/8 5 7/8 5 1/4
6 0.62565 0.05213 2.116 2.494 8 9/16 8 1/4 7 21/64
7 0.62400 0.05200 2.750 3.270 11 5/8 11 1/4 10 5/64

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Jarno Taper Shanks
This taper is based on simple formulas that require almost no calculations, when the number of taper is known.

Jarno Taper Shanks

Table 2. Jarno Taper Shanks

No. of Taper Length A Length B Diameter C Diameter D Taper per Foot
2 1 1/8 1 0.20 0.250 0.600
3 1 5/8 1 1/2 0.30 0.375 0.600
4 2 3/16 2 0.40 0.500 0.600
5 2 11/16 2 1/2 0.50 0.625 0.600
6 3 3/16 3 0.60 0.750 0.600
7 3 11/16 3 1/2 0.70 0.875 0.600
8 4 3/16 4 0.80 1.000 0.600
9 4 11/16 4 1/2 0.90 1.125 0.600
10 5 1/4 5 1.00 1.250 0.600
11 5 3/4 5 1/2 1.10 1.375 0.600
12 6 1/4 6 1.20 1.500 0.600
13 6 3/4 6 1/2 1.30 1.625 0.600
14 7 1/4 7 1.40 1.750 0.600
15 7 3/4 7 1/2 1.50 1.875 0.600
16 8 5/16 8 1.60 2.000 0.600
17 8  13/16 8  1/2 1.70 2.125 0.600
18 9  5/16 9 1.80 2.250 0.600
19 9 13/16 9 1/2 1.90 2.375 0.600
20 10 5/16 10 2.00 2.500 0.600

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American National Standard Taper Shanks

ANSI Taper Shanks

Table 3. American National Standard Taper Shanks

No. of Taper Taper per Foot Diameter at Gage Line Tolerances for Diameter A Diameter at A Length to L
      Class X Gage Class Y Gage Class Z Gage    
5 3.500 0.500 0.00004 0.00007 0.00010 0.2995 0.6875
10 3.500 0.625 0.00004 0.00007 0.00010 0.3698 0.8750
15 3.500 0.750 0.00004 0.00007 0.00010 0.4401 1.0625
20 3.500 0.875 0.00006 0.00009 0.00012 0.4922 1.3125
25 3.500 1.000 0.00006 0.00009 0.00012 0.5443 1.5625
30 3.500 1.250 0.00006 0.00009 0.00012 0.7031 1.8750
35 3.500 1.500 0.00006 0.00009 0.00012 0.8438 2.2500
40 3.500 1.750 0.00008 0.00012 0.00016 1.0026 2.5625
45 3.500 2.250 0.00008 0.00012 0.00016 1.2839 3.3125
50 3.500 2.750 0.00010 0.00015 0.00020 1.5833 4.0000
55 3.500 3.500 0.00010 0.00015 0.00020 1.9870 5.1875
60 3.500 4.250 0.00010 0.00015 0.00020 2.3906 6.3750

For more information go to our RFQ page.

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