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Internal Laps.htm
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Expanding Mandrels.htm
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Internal Laps Arbors and Expanders

 

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INTERNAL LAP

Internal Laps are made from a special fine grain lapping cast iron.  Cast iron is the ultimate lapping material, it's fine porous structure accelerates the lapping process.  Each Internal Laps bore is precision machined  then the outside diameter is ground on a master arbor to .0001" straightness.  The lap becomes straight to under 5 millionths of an inch with use.

Key Benefits

      American Lap Co. laps last longer then other style laps.
      American Lap Co. laps are precision machined eliminating break in or dressing time.
      American Lap Co. laps have spiral slots, so keyways and interruptions are not an issue.

LONG SERIES NOTED BY L IN PART NUMBER AND SHORT SERIES NOTED BY S IN PART NUMBER

LAP SIZES

 PART NO. ARBOR  NO.      
1/16 X 5/8 116L 000      
5/64 X 5/8 564L 000      
LAP SIZE PART NO. ARBOR  NO.      

3/32 X 3/4

332L

 00      
7/64 X 3/4 764L 00      
LAP SIZE PART NO. ARBOR  NO.      
1/8 X 7/8 18L 0      
5/32 X 7/8 532L 0      
9/94 X 7/8 964L 0      
11/64 X 7/8 1164L 0      
LAP SIZE PART NO. LAP SIZE PART NO. ARBOR  NO.  
3/16 X 1 3/8 316L 3/16 X 1 316S 1  
13/64 X 1 3/8 1364L 13/64 X 1 1364S 1  
LAP SIZE PART NO. LAP SIZE PART NO. ARBOR  NO.  
7/32 X 1 3/4 732L 7/32 X  1 1/4 732S 2  
15/64 1 3/4 1564L 15/64 X 1 1/4 1564S 2  
LAP SIZE PART NO. LAP SIZE PART NO. ARBOR  NO.  
1/4 X 2 14L 1/4 X 1 1/2 14S 3  
17/64 X 2 1764L 17/64 X 1 1/2 1764S 3  
9/32 X 2 932L 9/32 X 1 1/2 932S 3  
19/94 X 2 1964L 19/64 X 1 1/2 1964S 3  
LAP SIZE PART NO. LAP SIZE PART NO. ARBOR  NO.  
5/16 X 2 516L 5/16 X 1 1/2 516S 4  
21/64 X 2 2164L 21/64 X 1 1/2 2164S 4  
11/32 X 2 1132L 11/32 X 1 1/2 1132S 4  
23/64 X 2 2364L 23/64 X 1 1/2 2364S 4  
LAP SIZE PART NO. LAP SIZE PART NO. ARBOR  NO.  
3/8 X 2 1/2 38L 3/8 X 1 3/4 38S 5  
25/64 X 2 1/2 2564L 25/64 X 1 3/4 2564S 5  
13/32 X 2 1/2 1332L 13/32 X 1 3/4 1332S 5  
27/64 X 2 1/2 2764L 27/64 X 1 3/4 2764S 5  
LAP SIZE PART NO. LAP SIZE PART NO. ARBOR  NO.  
7/16 X 2 1/2 716L 7/16 X 1 3/4 716S 6  
29/64 X 2 1/2 2964L 29/64 X 1 3/4 2964S 6  
15/32 X 2 1/2 1532L 15/32 X 1 3/4 1532S 6  
31/64 X 2 1/2 3164L 31/64 X 1 3/4 3164S 6  
LAP SIZE PART NO. LAP SIZE PART NO. ARBOR  NO.  
1/2 X 3 1/4 12L 1/2 X 2 1/4 12S 7  
33/64 X 3 1/4 3364L 33/64 X 2 1/4 3364S 7  
17/32 X 3 1/4 1732L 17/32 X 2 1/4 1732L 7  
35/64 X 3 1/4 3564L 35/64 X 2 1/4 3564S 7  
9/16 X 3 1/4 916L 9/16 X 2 1/4 916S 7  
37/64 X 3 1/4 3764L 37/64 X 2 1/4 3764S 7  
19/32 X 3 1/4 1932L 19/32 X 2 1/4 1932S 7  
39/64 X 3 1/4 3964L 39/64 X 2 1/4 3964S 7  
LAP SIZE PART NO. LAP SIZE PART NO. ARBOR  NO.  
5/8 X 3 1/4 58L 5/8 X 2 1/4 58S 8  
41/64 X 3 1/4 4164L 41/64 X 2 1/4 4164S 8  
21/32 X 3 1/4 2132L 21/32 X 2 1/4 2132S 8  
43/64 X 3 1/4 4364L 43/64 X 2 1/4 4364S 8  
11/16 X 3 1/4 1116L 11/16 X 2 1/4 1116S 8  
45/64 X 3 1/4 4564L 45/64 X 2 1/4 4564S 8  
23/32 X 3 1/4 2332L 23/32 X 2 1/4 2332S 8  
47/64 X 3 1/4 4764L 47/64 X 2 1/4 4764S 8  
LAP SIZE PART NO. LAP SIZE PART NO. ARBOR  NO.  
3/4 X 3 1/2 34L 3/4 X 2 1/2 34S 9  
49/64 X 3 1/2 4964L 49/64 X 2 1/2 4964S 9  
25/32 X 3 1/2 2532L 25/32 X 2 1/2 2532S 9  
51/64 X 3 1/2 5164L 51/64 X 2 1/2 5164S 9  
13/16 X 3 1/2 1316L 13/16 X 2 1/2 1316S 9  
53/64 X 3 1/2 5364L 53/64 X 2 1/2 5364S 9  
27/32 X 3 1/2 2732L 27/32 X 2 1/2 2732S 9  
55/64 X 3 1/2 5564L 55/64 X 2 1/2 5564S 9  
LAP SIZE PART NO. LAP SIZE PART NO. ARBOR  NO.  
7/8 X 3 1/2 78L 7/8 X 2 1/2 78S 10  
57/64 X 3 1/2 5764L 57/64 X 2 1/2 5764S 10  
29/32 X 3 1/2 2932L 29/32 X 2 1/2 2932S 10  
59/64 X 3 1/2 5954L 59/64 X 2 1/2 5964S 10  
15/16 X 3 1/2 1516L 15/16 X 2 1/2 1516S 10  
61/64 X 3 1/2 6164L 61/64 X 2 1/2 6164S 10  
31/32 X 3 1/2 3132L 31/32 X 2 1/2 3132S 10  
63/64 X 3 1/2 6364L 63/64 X 2 1/2 6364S 10  
LAP SIZE PART NO. LAP SIZE PART NO. ARBOR  NO.  
1 X 4 1NL 1 X 3 1NS 11  
1 1/64 X 4 1N164L 1 1/64 X 3 1N164S 11  
1 1/32 X 4 1N132L 1 1/32 X 3 1N132S 11  
1 3/64 X 4 1N364L 1 3/64 X 3 1N364S 11  
1 1/16 X 4 1N116L 1 1/16 X 3 1N116S 11  
1 5/64 X 4 1N564L 1 5/64 X 3 1N564S 11  
1 3/32 X 4 1N332L 1 3/32 X 3 1332S 11  
1 7/64 X 4 1N764L 1 7/64 X 3 1N764S 11  
1 1/8 X 4 1N18 1 1/8 X 3 1N18S 11  
1 9/64 X 4 1N964L 1 9/64 X 3 1N964S 11  
1 5/32 X 4 1N532L 1 5/32 X 3 1N532S 11  
1 11/64 X 4 1N1164L 1 11/64 X 3 1N1164S 11  
1 3/16 X 4 1N316L 1 3/16 X 3 1N316S 11  
1 13/64 X 4 1N1365L 1 13/64 X 3 1N1364S 11  
1 7/32 X 4 1N732L 1 7/32 X 3 1N732S 11  
1 15/64 X 4 1N1564L 1 15/64 X 3 1N1564S 11  
1 1/4 X 4 1N14L 1 1/4 X 3 1N14S 11  
LAP SIZE PART NO. ARBOR  NO.      
1 5/16 x 4 1N516 12      
1 3/8 X 4 1N38 12      
1 7/16 X 4 1N716 12      
1 1/2 1N12 12      
1 9/16 1N916 12      
1 5/8 1N58 12      
LAP SIZE PART NO. ARBOR  NO.      
1 11/16 X 4 1N1116 13      
1 3/4 X 4 1N34 13      
1 13/16  X 4 1N1316 13      
1 7/8 X 4 1N78 13      
1 15/16 X 4 1N1516 13      
2 X 4 2NO 13      
LAP SIZE PART NO. ARBOR  NO.      
2 1/16 X 4 2N116 14      
2 1/8 X 4 2N18 14      
2 3/16 X 4 2N316 14      
2 1/4 X 4 2N14 14      
2 5/16 X 4 2N516 14      
2 3/8 X 4 2N38 14      
LAP SIZE PART NO. ARBOR  NO.      
2 7/16 X 4 2N716 15      
2 1/2 X 4 2N12 15      
2 9/16 X 4 2N916 15      
2 5/8 X 4 2N58 15      
2 11/16 X 4 2N1116 15      
LAP SIZE PART NO. ARBOR  NO.      
2 3/4 X 4 2N34 16      
2 13/16 X 4 2N1616 16      
2 7/8 X 4 2N78 16      
2 15/16 X 4 2N1516 16      
3 X 4 3NO 16      

ALL DIMENSION ARE IN INCHES

Special sizes are available from stock or in 5-7 days

TAPERED FOR EXPANSION ARBORS

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American Lap Company arbors are made from hardened tools steel and precision ground between centers.  The arbors are manufactured to very close tolerances so there is no change in the straightness of the lap when it is expanded.  The Lap is mounted on the Arbor by inserting the Arbor through the hole in the Lap.  The Lap and Arbor have locking tapers to provide rotation and expansion.  Expansion is achieved by moving the Lap laterally on the arbor.  When moved the slot allows the Lap to expand.

SHANK DIA. TAPER LENGTH PART NUMBER ARBOR NO. PART NUMBER TAPER LENGTH SHANK DIA.
LONG SERIES   SHORT SERIES
1/8 1 1/2 A000 000 X X X
1/8 1 5/8 A00 00 X X X
1/8 1 3/4 A0 0 X X X
3/16 2 3/4 A1L 1 A1S 2 3/16
3/16 3 A2L 2 A2S 2 1/2 3/16
3/16 4 A3L 3 A3S 3 3/16
7/32 4 A4L 4 A4S 3 7/32
9/32 5 A5L 5 A5S 3 3/4 7/32
9/32 5 A6L 6 A6S 3 3/4 9/32
3/8 6 A7L 7 A7S 4 1/2 3/8
SHANK DIA. TAPER LENGTH PART NUMBER ARBOR NO. PART NUMBER TAPER LENGTH SHANK DIA.
LONG SERIES   SHORT SERIES
13/32 6 A8L 8 A8S 4 1/2 13/32
1/2 7 A9L 9 A9S 5 1/2
9/16 7 A10L 10 A10S 5 9/16
3/4 8 A11L 11 A11S 6 3/4
7/8 7 1/2 A12 12 X X X
1 7 1/2 A13 13 X X X
1 1/4 7 1/2 A14 14 X X X
1 1/2 7 1/2 A15 15 X X X
1  3/4 7 1/2 A16 16 X X X

  ALL DIMENSIONS ARE IN INCHES

Special sizes are available from stock or in 5-7 days

LAP EXPANDERS

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American Lap Company Expanders are made of hardened tool steel.  The Expander is used by butting the end with the hole against the Lap and tapping with a hammer.

 

EXPANDER NUMBER        PART       NUMBER
000 LE000
00 LE00
00 LE0
1 LE1
2 LE2
3 LE3
4 LE4
5 LE5
6 LE6
7 LE7
8 LE8
9 LE9
10 LE10
11 LE11
12 LE12
13 LE13
14 LE14
15 LE15
16 LE16

LAP PULLERS

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American Lap Company Lap Pullers are used to retract the Lap on the Tapered Arbor when it is over expanded or to remove the Lap from the Tapered Arbor.  Each Lap Puller comes with a set of Discs to accommodate the Lap sizes with in the range of the Puller.  The Lap Pullers allow the operator to retract the Lap with out removing the Arbor and Lap from the machine.

NAME EXTRA SMALL PULLER SMALL LAP PULLER LARGE LAP PULLER
PART NUMBER ESLP SLP LLP
RETRACTS SIZES 1/16 - 11/64 3/16 - 39/64 5/8 - 1 1/4

 

        

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