GAGEMAKER LG-6001, Operation Manual, Page: 15 / 24

Lead Gage Operation Manual Model LG-6001
Copyright © 2016 Gagemaker. All rights reserved 15
Zeroing the Lead Gage
Materials Needed:

Lead gage

Lead gage standard
The lead gage performs a comparative inspection between a fixed standard and the threaded part.
Before applying the gage to a part, you must zero the lead gage on the proper standard.
Based on the type of connection being inspected, locate the proper lead gage standard in the table
below to ensure consistent and accurate readings. The lead gage should be zeroed on a standard once
during each shift, at a minimum.
Connection Type
Taper
(in/ft)
Threads
per Inch
Lead Gage
Standard Model
Number
8 & 10 Round Tubing / Casing ¾ 8 & 10 LS-1001
8 & 10 V Form Tubing (straight) 0 8 & 10 LS-1002
Line Pipe Tubing / Casing ¾ 11½ LS-1003
Line Pipe (straight) 0 11½ LS-1004
13
⅜
” & smaller Buttress Casing ¾ 5 LS-1005
16” & larger Buttress Casing 1 5 LS-1006
6
⅝
API Reg
4”, 5½” - 6
⅝
” FH
2
⅜
” - 5½” IF
2
⅞
” - 5” XH
NC23 – NC50
2 4 LS-1007
5½” Reg
7
⅝
” - 8
⅝
” Reg
NC56 – NC77
3 4 LS-1008
2
⅜
” - 4 ½” Reg
2
⅞
” - 3 ½”, 4½” FH
3 5 LS-1009
2
⅜
” Open Hole 1½ 4 LS-1010
3½” - 6
⅝
” H-90 2 3½ LS-1011
7” - 8
⅝
” H-90 3 3½ LS-1012
2
⅜
” - 3½” Slimline H-90 1¼ 3 LS-1013