083 : Compac dial bore gage parts list IA3A and IA4A

page 83

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Long Island Indicator Service Inc Precision Tool Repairs, Sales & Spare Parts

Compac dial bore gage parts list Model IA3A (2 to 6") and IA4A (2 to 12") measuring heads. These are the same parts used by Interapid, Alina and SPI models 20-019-6, 20-021-2, 20-018-8, and 20-020-4 dial bore gages made in Switzerland. The parts for the dial indicator used with this bore gage are shown on a separate list. See page 84. Take note of the part numbers and quantities you need, then proceed to the parts price list to place your order online. The SPI part numbers are shown for cross-reference purposes. You'll have to use our part number when ordering. Indicator parts are listed separately. All parts are made in Switzerland unless otherwise noted.
Dwg	Part no.	SPI Part no.

	IA4A	20-021-2	2-12" measuring head with box and all plugs (see info)
	IA3A	20-019-6	2-6" measuring head with box and all plugs (see info)
	IA-34	20-040-2	kit transforms 2-6" into 2-12"	Price
0	042389		wooden box for 2-6" and 2-12" (on request)	Price
1	044123	04-812-4	measuring head only	Price
5	041978		set screw (5 mm long) old style	Price
5	042000		set screw (6 mm long) new style	Price
6	041893		vertical rack	Price
7	042139		flat contact	Price
8	041894		spring	Price
9	041895		centering washer	Price
10	042035		guide ø1,95	Price
11	041896		horizontal rack (specify size from 3.65 to 3.77)	Price
12	041897		lower guide	Price
15	044125		sliding contact	Price
16	041898		protection plug	Price
18	041977		screw for cover	Price
19	042034		brass bushing	Price
20	042041		pinion	Price
21	043197	04-827-2	screw (cone head)	Price
23	044127	04-828-0	extension O	Price
24	041900	04-829-8	extension A	Price
24	041901	04-830-6	extension B	Price
25	044128	04-831-4	contact #1	Price
25	044129	04-832-3	contact #2	Price
25	044130	04-833-0	contact #3	Price
25	044131	04-834-8	contact #4	Price
25	044132	04-835-5	contact #5	Price
27	040406		clamp (unfinished; see information below)	Price
28	041903		nut for #040406	Price
29	044134		centering sled (carbide) for 2-6"	Price
29	044133		centering sled (steel) for 2-6"	Price
31	041906	04-840-5	screw for centering sled	Price
32	041907	04-841-3	spring for centering sled	Price
33	042066		wrench for contacts (made in Germany)	Price
34	041908		contact holder only	Price
34	044136		holder with 5 contacts	Price
37	044137		tube	Price
40	042140		round contact for 2-6" #041912	Price
42	RI-100	20-043-6	depth extension (100 mm)	Price
50	044138		extension C with screw for 2-12"	Price
51	041914		screw for 2-12" #044138	Price
52	041915		extension D for 2-12"	Price
53	044140		centering sled (carbide) for 2-12"	Price
53	044139		centering sled (steel) for 2-12"	Price
Proceed to parts price list and order page

Compac bore gage clamp important information

The square shaped clamp on the 2-6" and 2-12" bore gage models which hold the extensions in place is part #040406 (see drawing item 27). This clamp is sent unfinished. It doesn't have a thread. The reason is, the thread needs to be custom cut to match the thread already in your gage head.

If you want to do it yourself, you'll need a metric M12x1 tap. Remove the old clamp, put the unfinished clamp in place and using the thread of the bore gage head as a guide, insert the tap, cutting a thread into the clamp. Of course, if you prefer, we can install this for you.

Centering sled

A new centering sled is not necessarily easy to install. It looks like it should simply slide into the two holes but chances are that the posts won't be aligned and your sled will jam. Don't force anything and for heaven's sake don't try to bend the posts. They'll snap off. These sleds are custom fit on new gages and that's why you'll run into trouble trying to replace them. If the fit is tight, try a bit of emery and see if that works. Check that there are no burrs. Advance carefully and you'll probably succeed. The other, and better option, is to send it to us for installation

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