External Expanding Cast Iron Laps & Lap Holders

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External Lapping Tools should be shorter than the length of the part being lapped. When lapping a cylindrical part with lands, the external lap should be long enough to span as many lands as possible to prevent rolling edges. Standard external laps are manufactured slightly over size to allow for clearance and can be tightened to the appropriate diameter with the external lap holder.

SPECIAL SIZE EXTERNAL LAPS AND HOLDERS CAN BE MADE TO SUIT YOUR APPLICATION.

external-slot
external-lapholder
external-partB
PART #A
LAP SIZE
B
LENGTH
HOLDER NO.
*3/64 SELS3/643/80SLHS
*3/64 SELM3/641/20SLHM
*3/64 SELL3/6410SLHL
*1/16 SELS1/163/80SLHS
*1/16 SELM1/161/20SLHM
*1/16 SELL1/1610SLHL
*5/64 SELS5/643/80SLHS
*5/64 SELM5/641/20SLHM
*5/64 SELL5/6410SLHL
*3/32 SELS3/323/80SLHS
*3/32 SELM3/321/20SLHM
*3/32 SELL3/3210SLHL
*7/64 SELS7/643/80SLHS
*7/64 SELM7/641/20SLHM
*7/64 SELL7/6410SLHL
*1/8 SELS1/83/80SLHS
*1/8 SELM1/81/20SLHM
*1/8 SELL1/810SLHL
9/64 SELSH9/641/21SLHS
9/64 SELMH9/643/41 SLHM
9/64 SELLH9/641-1/21SLHL
5/32 SELSH5/321/21SLHS
5/32 SELMH5/323/41 SLHM
5/32 SELLH5/321-1/21SLHL
11/64 SELSH11/641/21SLHS
11/64 SELMH11/643/41 SLHM
11/64 SELLH11/641-1/21SLHL
3/16 SELSH3/161/21SLHS
3/16 SELMH3/163/41 SLHM
3/16 SELLH3/161-1/21SLHL
13/64 SELSH13/641/22SLHS
13/64 SELMH13/643/42SLHM
13/64 SELLH13/641-1/22SLHL
7/32 SELSH7/321/22SLHS
7/32 SELMH7/323/42SLHM
7/32 SELLH7/321-1/22SLHL
15/64 SELSH15/641/22SLHS
15/64 SELMH15/643/42SLHM
15/64 SELLH15/641-1/22SLHL
1/4 SELSH1/41/22SLHS
1/4 SELMH1/43/42SLHM
1/4 SELLH1/41-1/22SLHL
17/64 SELSH17/641/23SLHS
17/64 SELMH17/643/43SLHM
17/64 SELLH17/641-1/23SLHL
9/32 SELSH9/321/23SLHS
9/32 SELMH9/323/43SLHM
9/32 SELLH9/321-1/23SLHL
19/64 SELSH19/641/23SLHS
19/64 SELMH19/643/43SLHM
19/64 SELLH19/641-1/23SLHL
5/16 SELSH5/161/23SLHS
5/16 SELMH5/163/43SLHM
5/16 SELLH5/161-1/23SLHL
21/64 SELSH21/641/24SLHS
21/64 SELMH21/643/44SLHM
21/64 SELLH21/641-1/24SLHL
11/32 SELSH11/321/24SLHS
11/32 SELMH11/323/44SLHM
11/32 SELLH11/321-1/24SLHL
23/64 SELSH23/641/24SLHS
23/64 SELMH23/643/44SLHM
23/64 SELLH23/641-1/24SLHL
3/8 SELSH3/81/24SLHS
3/8 SELMH3/83/44SLHM
3/8 SELLH3/81-1/24SLHL
25/64 SELSH25/641/25SLHS
25/64 SELMH25/643/45SLHM
25/64 SELLH25/641-1/25SLHL
13/32 SELSH13/321/25SLHS
13/32 SELMH13/323/45SLHM
13/32 SELLH13/321-1/25SLHL
27/64 SELSH27/641/25SLHS
27/64 SELMH27/643/45SLHM
27/64 SELLH27/641-1/25SLHL
7/16 SELSH7/161/25SLHS
7/16 SELMH7/163/45SLHM
7/16 SELLH7/161-1/25SLHL
29/64 SELSH29/641/26SLHS
29/64 SELMH29/643/46SLHM
29/64 SELLH29/641-1/26SLHL
15/32 SELSH15/321/26SLHS
15/32 SELMH15/323/46SLHM
15/32 SELLH15/321-1/26SLHL
31/64 SELSH31/641/26SLHS
31/64 SELMH31/643/46SLHM
31/64 SELLH31/641-1/26SLHL
1/2 SELSH1/21/26SLHS
1/2 SELMH1/23/46SLHM
1/2 SELLH1/21-1/26SLHL
17/32 SELSH17/321/27SLHS
17/32 SELMH17/3217SLHM
17/32 SELLH17/3227SLHL
9/16 SELSH9/161/27SLHS
9/16 SELMH9/1617SLHM
9/16 SELLH9/1627SLHL
19/32 SELSH19/321/27SLHS
19/32 SELMH19/3217SLHM
19/32 SELLH19/3227SLHL
5/8 SELSH5/81/27SLHS
5/8 SELMH5/817SLHM
5/8 SELLH5/827SLHL
21/32 SELSH21/321/28SLHS
21/32 SELMH21/3218SLHM
21/32 SELLH21/3228SLHL
11/16 SELSH11/161/28SLHS
11/16 SELMH11/1618SLHM
11/16 SELLH11/1628SLHL
23/32 SELSH23/321/28SLHS
23/32 SELMH23/3218SLHM
23/32 SELLH23/3228SLHL
3/4 SELSH3/41/28SLHS
3/4 SELMH3/418SLHM
3/4 SELLH3/428SLHL
25/32 SELSH 25/321/29SLHS
25/32 SELMH25/3219SLHM
25/32 SELLH25/3229SLHL
13/16 SELSH13/161/29SLHS
13/16 SELMH13/1619SLHM
13/16 SELLH13/1629SLHL
27/32 SELSH27/321/29SLHS
27/32 SELMH27/3219SLHM
27/32 SELLH27/3229SLHL
7/8 SELSH7/81/29SLHS
7/8 SELMH7/819SLHM
7/8 SELLH7/829SLHL
29/32 SELSH29/321/210SLHS
29/32 SELMH29/32110SLHM
29/32 SELLH29/32210SLHL
15/16 SELSH15/161/210SLHS
15/16 SELMH15/16110SLHM
15/16 SELLH15/16210SLHL
31/32 SELSH31/321/210SLHS
31/32 SELMH31/32110SLHM
31/32 SELLH31/32210SLHL
1 SELSH11/210SLHS
1 SELMH1110SLHM
1 SELLH1210SLHL
1-1/16 SELSH1-1/163/411SLHS
1-1/16 SELMH1-1/161-1/211SLHM
1-1/16 SELLH1-1/162-1/211SLHL
1-1/8 SELSH1-1/83/411SLHS
1-1/8 SELMH1-1/81-1/211SLHM
1-1/8 SELLH1-1/82-1/211SLHL
1-3/16 SELSH1-3/163/411SLHS
1-3/16 SELMH1-3/161-1/211SLHM
1-3/16 SELLH1-3/162-1/211SLHL
1-1/4 SELSH1-1/43/411SLHS
1-1/4 SELMH1-1/41-1/211SLHM
1-1/4 SELLH1-1/42-1/211SLHL
1-5/16 SELSH1-5/163/412SLHS
1-5/16 SELMH1-5/161-1/212SLHM
1-5/16 SELLH1-5/162-1/212SLHL
1-3/8 SELSH1-3/83/412SLHS
1-3/8 SELMH1-3/81-1/212SLHM
1-3/8 SELLH1-3/82-1/212SLHL
1-7/16 SELSH1-7/163/412SLHS
1-7/16 SELMH1-7/161-1/212SLHM
1-7/16 SELLH1-7/162-1/212SLHL
1-1/2 SELSH1-1/23/412SLHS
1-1/2 SELMH1-1/21-1/212SLHM
1-1/2 SELLH1-1/22-1/212SLHL
1-9/16 SELSH1-9/163/413SLHS
1-9/16 SELMH1-9/161-1/213SLHM
1-9/16 SELLH1-9/162-1/213SLHL
1-5/8 SELSH1-5/83/413SLHS
1-5/8 SELMH1-5/81-1/213SLHM
1-5/8 SELLH1-5/82-1/213SLHL
1-11/16 SELSH1-11/163/413SLHS
1-11/16 SELMH1-11/161-1/213SLHM
1-11/16 SELLH1-11/162-1/213SLHL
1-3/4 SELSH1-3/43/413SLHS
1-3/4 SELMH1-3/41-1/213SLHM
1-3/4 SELLH1-3/42-1/213SLHL
1-13/16 SELSH1-13/163/413SLHS
1-13/16 SELMH1-13/161-1/213SLHM
1-13/16 SELLH1-13/162-1/213SLHL
1-7/8 SELSH1-7/83/413SLHS
1-7/8 SELMH1-7/81-1/213SLHM
1-7/8 SELLH1-7/82-1/213SLHL
1-15/16 SELSH1-15/163/413SLHS
1-15/16 SELMH1-15/161-1/213SLHM
1-15/16 SELLH1-15/162-1/213SLHL
2 SELSH23/413SLHS
2 SELMH21-1/213SLHM
2 SELLH22-1/213SLHL