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.

PART #	A LAP SIZE	B LENGTH	HOLDER NO.
*3/64 SELS	3/64	3/8	0SLHS
*3/64 SELM	3/64	1/2	0SLHM
*3/64 SELL	3/64	1	0SLHL
*1/16 SELS	1/16	3/8	0SLHS
*1/16 SELM	1/16	1/2	0SLHM
*1/16 SELL	1/16	1	0SLHL
*5/64 SELS	5/64	3/8	0SLHS
*5/64 SELM	5/64	1/2	0SLHM
*5/64 SELL	5/64	1	0SLHL
*3/32 SELS	3/32	3/8	0SLHS
*3/32 SELM	3/32	1/2	0SLHM
*3/32 SELL	3/32	1	0SLHL
*7/64 SELS	7/64	3/8	0SLHS
*7/64 SELM	7/64	1/2	0SLHM
*7/64 SELL	7/64	1	0SLHL
*1/8 SELS	1/8	3/8	0SLHS
*1/8 SELM	1/8	1/2	0SLHM
*1/8 SELL	1/8	1	0SLHL
9/64 SELSH	9/64	1/2	1SLHS
9/64 SELMH	9/64	3/4	1 SLHM
9/64 SELLH	9/64	1-1/2	1SLHL
5/32 SELSH	5/32	1/2	1SLHS
5/32 SELMH	5/32	3/4	1 SLHM
5/32 SELLH	5/32	1-1/2	1SLHL
11/64 SELSH	11/64	1/2	1SLHS
11/64 SELMH	11/64	3/4	1 SLHM
11/64 SELLH	11/64	1-1/2	1SLHL
3/16 SELSH	3/16	1/2	1SLHS
3/16 SELMH	3/16	3/4	1 SLHM
3/16 SELLH	3/16	1-1/2	1SLHL
13/64 SELSH	13/64	1/2	2SLHS
13/64 SELMH	13/64	3/4	2SLHM
13/64 SELLH	13/64	1-1/2	2SLHL
7/32 SELSH	7/32	1/2	2SLHS
7/32 SELMH	7/32	3/4	2SLHM
7/32 SELLH	7/32	1-1/2	2SLHL
15/64 SELSH	15/64	1/2	2SLHS
15/64 SELMH	15/64	3/4	2SLHM
15/64 SELLH	15/64	1-1/2	2SLHL
1/4 SELSH	1/4	1/2	2SLHS
1/4 SELMH	1/4	3/4	2SLHM
1/4 SELLH	1/4	1-1/2	2SLHL
17/64 SELSH	17/64	1/2	3SLHS
17/64 SELMH	17/64	3/4	3SLHM
17/64 SELLH	17/64	1-1/2	3SLHL
9/32 SELSH	9/32	1/2	3SLHS
9/32 SELMH	9/32	3/4	3SLHM
9/32 SELLH	9/32	1-1/2	3SLHL
19/64 SELSH	19/64	1/2	3SLHS
19/64 SELMH	19/64	3/4	3SLHM
19/64 SELLH	19/64	1-1/2	3SLHL
5/16 SELSH	5/16	1/2	3SLHS
5/16 SELMH	5/16	3/4	3SLHM
5/16 SELLH	5/16	1-1/2	3SLHL
21/64 SELSH	21/64	1/2	4SLHS
21/64 SELMH	21/64	3/4	4SLHM
21/64 SELLH	21/64	1-1/2	4SLHL
11/32 SELSH	11/32	1/2	4SLHS
11/32 SELMH	11/32	3/4	4SLHM
11/32 SELLH	11/32	1-1/2	4SLHL
23/64 SELSH	23/64	1/2	4SLHS
23/64 SELMH	23/64	3/4	4SLHM
23/64 SELLH	23/64	1-1/2	4SLHL
3/8 SELSH	3/8	1/2	4SLHS
3/8 SELMH	3/8	3/4	4SLHM
3/8 SELLH	3/8	1-1/2	4SLHL
25/64 SELSH	25/64	1/2	5SLHS
25/64 SELMH	25/64	3/4	5SLHM
25/64 SELLH	25/64	1-1/2	5SLHL
13/32 SELSH	13/32	1/2	5SLHS
13/32 SELMH	13/32	3/4	5SLHM
13/32 SELLH	13/32	1-1/2	5SLHL
27/64 SELSH	27/64	1/2	5SLHS
27/64 SELMH	27/64	3/4	5SLHM
27/64 SELLH	27/64	1-1/2	5SLHL
7/16 SELSH	7/16	1/2	5SLHS
7/16 SELMH	7/16	3/4	5SLHM
7/16 SELLH	7/16	1-1/2	5SLHL
29/64 SELSH	29/64	1/2	6SLHS
29/64 SELMH	29/64	3/4	6SLHM
29/64 SELLH	29/64	1-1/2	6SLHL
15/32 SELSH	15/32	1/2	6SLHS
15/32 SELMH	15/32	3/4	6SLHM
15/32 SELLH	15/32	1-1/2	6SLHL
31/64 SELSH	31/64	1/2	6SLHS
31/64 SELMH	31/64	3/4	6SLHM
31/64 SELLH	31/64	1-1/2	6SLHL
1/2 SELSH	1/2	1/2	6SLHS
1/2 SELMH	1/2	3/4	6SLHM
1/2 SELLH	1/2	1-1/2	6SLHL
17/32 SELSH	17/32	1/2	7SLHS
17/32 SELMH	17/32	1	7SLHM
17/32 SELLH	17/32	2	7SLHL
9/16 SELSH	9/16	1/2	7SLHS
9/16 SELMH	9/16	1	7SLHM
9/16 SELLH	9/16	2	7SLHL
19/32 SELSH	19/32	1/2	7SLHS
19/32 SELMH	19/32	1	7SLHM
19/32 SELLH	19/32	2	7SLHL
5/8 SELSH	5/8	1/2	7SLHS
5/8 SELMH	5/8	1	7SLHM
5/8 SELLH	5/8	2	7SLHL
21/32 SELSH	21/32	1/2	8SLHS
21/32 SELMH	21/32	1	8SLHM
21/32 SELLH	21/32	2	8SLHL
11/16 SELSH	11/16	1/2	8SLHS
11/16 SELMH	11/16	1	8SLHM
11/16 SELLH	11/16	2	8SLHL
23/32 SELSH	23/32	1/2	8SLHS
23/32 SELMH	23/32	1	8SLHM
23/32 SELLH	23/32	2	8SLHL
3/4 SELSH	3/4	1/2	8SLHS
3/4 SELMH	3/4	1	8SLHM
3/4 SELLH	3/4	2	8SLHL
25/32 SELSH	25/32	1/2	9SLHS
25/32 SELMH	25/32	1	9SLHM
25/32 SELLH	25/32	2	9SLHL
13/16 SELSH	13/16	1/2	9SLHS
13/16 SELMH	13/16	1	9SLHM
13/16 SELLH	13/16	2	9SLHL
27/32 SELSH	27/32	1/2	9SLHS
27/32 SELMH	27/32	1	9SLHM
27/32 SELLH	27/32	2	9SLHL
7/8 SELSH	7/8	1/2	9SLHS
7/8 SELMH	7/8	1	9SLHM
7/8 SELLH	7/8	2	9SLHL
29/32 SELSH	29/32	1/2	10SLHS
29/32 SELMH	29/32	1	10SLHM
29/32 SELLH	29/32	2	10SLHL
15/16 SELSH	15/16	1/2	10SLHS
15/16 SELMH	15/16	1	10SLHM
15/16 SELLH	15/16	2	10SLHL
31/32 SELSH	31/32	1/2	10SLHS
31/32 SELMH	31/32	1	10SLHM
31/32 SELLH	31/32	2	10SLHL
1 SELSH	1	1/2	10SLHS
1 SELMH	1	1	10SLHM
1 SELLH	1	2	10SLHL
1-1/16 SELSH	1-1/16	3/4	11SLHS
1-1/16 SELMH	1-1/16	1-1/2	11SLHM
1-1/16 SELLH	1-1/16	2-1/2	11SLHL
1-1/8 SELSH	1-1/8	3/4	11SLHS
1-1/8 SELMH	1-1/8	1-1/2	11SLHM
1-1/8 SELLH	1-1/8	2-1/2	11SLHL
1-3/16 SELSH	1-3/16	3/4	11SLHS
1-3/16 SELMH	1-3/16	1-1/2	11SLHM
1-3/16 SELLH	1-3/16	2-1/2	11SLHL
1-1/4 SELSH	1-1/4	3/4	11SLHS
1-1/4 SELMH	1-1/4	1-1/2	11SLHM
1-1/4 SELLH	1-1/4	2-1/2	11SLHL
1-5/16 SELSH	1-5/16	3/4	12SLHS
1-5/16 SELMH	1-5/16	1-1/2	12SLHM
1-5/16 SELLH	1-5/16	2-1/2	12SLHL
1-3/8 SELSH	1-3/8	3/4	12SLHS
1-3/8 SELMH	1-3/8	1-1/2	12SLHM
1-3/8 SELLH	1-3/8	2-1/2	12SLHL
1-7/16 SELSH	1-7/16	3/4	12SLHS
1-7/16 SELMH	1-7/16	1-1/2	12SLHM
1-7/16 SELLH	1-7/16	2-1/2	12SLHL
1-1/2 SELSH	1-1/2	3/4	12SLHS
1-1/2 SELMH	1-1/2	1-1/2	12SLHM
1-1/2 SELLH	1-1/2	2-1/2	12SLHL
1-9/16 SELSH	1-9/16	3/4	13SLHS
1-9/16 SELMH	1-9/16	1-1/2	13SLHM
1-9/16 SELLH	1-9/16	2-1/2	13SLHL
1-5/8 SELSH	1-5/8	3/4	13SLHS
1-5/8 SELMH	1-5/8	1-1/2	13SLHM
1-5/8 SELLH	1-5/8	2-1/2	13SLHL
1-11/16 SELSH	1-11/16	3/4	13SLHS
1-11/16 SELMH	1-11/16	1-1/2	13SLHM
1-11/16 SELLH	1-11/16	2-1/2	13SLHL
1-3/4 SELSH	1-3/4	3/4	13SLHS
1-3/4 SELMH	1-3/4	1-1/2	13SLHM
1-3/4 SELLH	1-3/4	2-1/2	13SLHL
1-13/16 SELSH	1-13/16	3/4	13SLHS
1-13/16 SELMH	1-13/16	1-1/2	13SLHM
1-13/16 SELLH	1-13/16	2-1/2	13SLHL
1-7/8 SELSH	1-7/8	3/4	13SLHS
1-7/8 SELMH	1-7/8	1-1/2	13SLHM
1-7/8 SELLH	1-7/8	2-1/2	13SLHL
1-15/16 SELSH	1-15/16	3/4	13SLHS
1-15/16 SELMH	1-15/16	1-1/2	13SLHM
1-15/16 SELLH	1-15/16	2-1/2	13SLHL
2 SELSH	2	3/4	13SLHS
2 SELMH	2	1-1/2	13SLHM
2 SELLH	2	2-1/2	13SLHL