Gage Maker Tolerance Chart May 22 2014

Although not yet available through our online shop, we do sell many forms of fixed limit gaging.  We offer cylindrical gaging, thread gaging, and many attribute gage designs from a variety of gage makers.  Feel free to check out our LINE CARD to see all the makers of gaging we represent.

Below is the gage makers tolerance chart. This chart is used to determine allowable tolerances gage makers follow when producing cylindrical fixed limit gaging (rings, plugs, pins, discs, etc.).

This comes in handy when determining the class of fit best suited for your gaging application.  Feel free to contact our sales department to request a quotation or discuss any gaging applications you may have.

Above To & Including XXX XX X Y Z
.010-
.254mm		 .825
20.96mm		 .00001
.00025mm		 .00002
.00051mm		 .00004
.00102mm		 .00007
.00178mm		 .0001
.00254mm
.825-
20.96mm		 1.510
38.35mm		 .000015
.00038mm		 .00003
.00076mm		 .00006
.00152mm		 .00009
.00229mm		 .00012
.00305mm
1.510-
38.35mm		 2.510
63.75mm		 .00002
.00050mm		 .00004
.00102mm		 .00008
.00203mm		 .00012
.00305mm		 .00016
.00406mm
2.510-
63.75mm		 4.510
114.55mm		 .000025
.00063mm		 .00005
.00127mm		 .0001
.00254mm		 .00015
.00381mm		 .0002
.00508mm
4.510-
114.55mm		 6.510
165.35mm		 .000033
.00083mm		 .000065
.00165mm		 .00013
.00330mm		 .00019
.00483mm		 .00025
.00635mm
6.510-
165.35mm		 9.010
228.85mm		 .00004
.001mm		 .00008
.00203mm		 .00016
.00406mm		 .00024
.00610mm		 .00032
.00813mm
9.010-
228.85mm		 12.010
305.05mm		 .00005
.00125mm		 .0001
.00254mm		 .0002
.00508mm		 .0003
.00762mm		 .0004
.01016mm

 

Direction of Tolerances

Plug Gages

Go Member - Tolerance applied to the plus side.
No Go Member - Tolerance applied to the minus side.
Master (Bilateral) - Tolerance is equally split plus and minus

 

Ring Gages

Go Member - Tolerance applied to the minus side.
No Go Member - Tolerance applied to the plus side.
Master (Bilateral) - Tolerance is equally split plus and minus

 

Roundness and Taper and Hardness

  • Not to exceed 50% of Tolerance
  • Hardness should be between 58 and 64 as measured on the Rockwell C Scale