ID Xpansion™ Clamps
The ID Xpansion™ clamp is the ideal solution to hold parts on an inside diameter for high density machining on vertical or horizontal machining centers. It can also be used as an expanding mandrel on a lathe.
These machinable clamps are produced in 12L14 steel with black oxide coating in 12 sizes and can hold internal diameters from under 3/16 to almost 10 inches (4.1 to 254mm). #10 manufactured using 7075-T6 aluminum.
The flange diameter of the clamp is held to a close tolerance for precision locating in a machined pocket on work cubes and fixture plates.
The customer machines the mild steel clamp to match the bore of the part ensuring a proper fit. Often times the clamps can be remachined for different size jobs.
The low profile ID Xpansion™ Clamp can hold several parts in one compact area for secondary operations without any clamping interference. They are quickly tightened with a hex key, torque driver or can be mated to hydraulic pull cylinders for automation.
- Low Profile
- Ideal for Secondary Operations on lathe parts
- Easily machined to size on lathe or mill
- Excellent for palletized setups
- Allows more parts per workcube or fixture plate
- Heat-treated and coated screw for long life
- Clamp body made of mild steel for machinability
- Tighten with hex key or hydraulic pull cylinders
(Drill clearance hole for longer bolt into cylinder)
- Longer screws available for hydraulic applications
- Longer tapered screws available for each ID size
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Clamp Machining and Installation
Inch
Part
Number | Model
Number | Â | A | B | C | D | E+.000
-.002 | F | G+ | H* | I | J | Torque
(Ft/lbs.) | Holding
Force (lbs) | Replacement
Tapered Screws |
|---|
| 31000 |
#00 |
 |
.42 |
.30 |
.24 |
.12 |
.787 |
.29 |
.16 |
2-56 on .540 BHC |
2-56 x 1/4 |
.16 |
0.5 |
250 |
31001 |
| 31050 |
#0 |
 |
.86 |
.63 |
.59 |
.23 |
1.170 |
.49 |
.28 |
6-32 on .825 BHC |
8-32 x 1 |
.30 |
3.6 |
950 |
31002 |
| 31100 |
#1 |
 |
.98 |
.75 |
.59 |
.23 |
1.240 |
.56 |
.48 |
6-32 on .910 BHC |
1/4-20 x 1 1/4 |
.50 |
13.3 |
1,900 |
31010 |
| 31150 |
#2 |
 |
.98 |
.75 |
.59 |
.23 |
1.476 |
.79 |
.53 |
6-32 on 1.140 BHC |
5/16-18 x 1 1/4 |
.56 |
27.6 |
2,500 |
31020 |
| 31200 |
#3 |
 |
1.13 |
.88 |
.69 |
.25 |
1.968 |
1.06 |
.71 |
8-32 on 1.550 BHC |
3/8-16 x 1 1/2 |
.71 |
49.3 |
4,500 |
31032 |
| 31250 |
#4 |
 |
1.25 |
1.0 |
.81 |
.25 |
2.205 |
1.39 |
.90 |
8-32 on 1.790 BHC |
1/2-13 x 1 1/2 |
.71 |
120.0 |
5,900 |
31042 |
| 31300 |
#5 |
 |
1.56 |
1.25 |
1.06 |
.31 |
2.736 |
1.65 |
1.15 |
10-32 on 2.200 BHC |
5/8-11 x 1 3/4 |
.79 |
224.0 |
10,000 |
31052 |
| 31350 |
#6 |
 |
1.56 |
1.25 |
1.06 |
.31 |
2.972 |
2.03 |
1.15 |
10-32 on 2.515 BHC |
5/8-11 x 1 3/4 |
.79 |
224.0 |
10,000 |
31052 |
| 31400 |
#7 |
 |
1.79 |
1.48 |
1.27 |
.31 |
4.232 |
3.06 |
1.15 |
1/4-20 on 3.646 BHC |
5/8-11 x 2 |
.79 |
224.0 |
10,000 |
31072 |
| 31450 |
#8 |
 |
1.79 |
1.48 |
1.27 |
.31 |
5.232 |
4.06 |
1.15 |
1/4-20 on 4.648 BHC |
5/8-11 x 2 |
.79 |
224.0 |
10,000 |
31072 |
| 31500 |
#9 |
 |
1.79 |
1.48 |
1.27 |
.31 |
5.232 |
6.89 |
1.15 |
1/4-20 on 4.648 BHC |
5/8-11 x 2 |
.79 |
224.0 |
10,000 |
31072 |
| 31550** |
#10 |
 |
1.79 |
1.48 |
1.27 |
.31 |
6.000 |
9.85 |
1.15 |
1/4-20 on 5.250 BHC |
5/8-11 x 2 |
.79 |
125.0 |
6,000 |
31072 |
G+ Minimum diameter the “F” dimension can be machined or turned down to.
H* – (3) Mounting Screws Included. (4) Mounting Screws Included with #9 & #10.
** – Clamp made from 7075-T6 aluminum.
ID Xpansion™ Clamp Machining and Installation
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| MODEL #00 – #6 ID Xpansion™ Clamps |
- Expand clamp approximately .002 to .003 over relaxed diameter and machine to fit workpiece bore, either on lathe or mill.
- If machining the clamp on a lathe use the nut provided, on the back of the clamp, to tighten the tapered screw. This nut is used only while machining the clamp.
- Machine a pocket in the fixture, for the close tolerance “E” dimension and drill and tap mounting holes per “H” column. Drill and tap a hole from the “I” column in the center of the pocket for the tapered screw.
- A recessed dowel pin may be installed into the flange for additional rigidity if required.
- Custom screws available for blind hole applications.
- Range of expansion .005 to .025 depending upon size.
|
| MODEL #7-10 ID Xpansion™ Clamps |
- Locking ring provided to ensure segments remain rigid while machining clamps to size. #10 ID ships with 2 rings.
- Insert ring(s) and tighten drive screw, machine clamp to bore size. Remove ring(s) to clamp workpiece.
- Expand mandrel then machine to size.
- Aggressive material removal is not recommended when machining clamps to size.
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Metric
Part
Number | Model
Number | Â | A | B | C | D | E+.000
-.050 | F | G+ | H* | I | J | Torque
(N.m.) | Holding
Force (N.) | Replacement
Tapered Screws |
|---|
| 38000 |
#00 |
 |
10.7 |
7.6 |
6.1 |
3.0 |
20.0 |
7.4 |
4.1 |
M2 on 13.7 BHC |
M2x12 |
4.1 |
.70 |
1,113 |
38001 |
| 38050 |
#0 |
 |
21.8 |
16.0 |
15.0 |
5.9 |
29.72 |
12.4 |
7.1 |
M3 on 20.95 BHC |
M4x25 |
7.2 |
5.00 |
4,228 |
38002 |
| 38100 |
#1 |
 |
24.9 |
19.0 |
15.0 |
5.9 |
31.5 |
14.2 |
12.2 |
M3 on 23.1 BHC |
M6x30 |
11.2 |
17.00 |
8,455 |
38010 |
| 38150 |
#2 |
 |
24.9 |
19.0 |
15.0 |
5.9 |
37.5 |
20.0 |
13.5 |
M3 on 29.0 BHC |
M8x30 |
13.2 |
34.00 |
11,125 |
38020 |
| 38200 |
#3 |
 |
28.6 |
22.2 |
17.5 |
6.4 |
50.0 |
27.0 |
18.0 |
M4 on 39.4 BHC |
M10x35 |
16.3 |
60.00 |
20,025 |
38032 |
| 38250 |
#4 |
 |
31.8 |
25.4 |
20.6 |
6.4 |
56.0 |
35.3 |
23.0 |
M4 on 45.5 BHC |
M12x40 |
20.3 |
150.00 |
26,255 |
38042 |
| 38300 |
#5 |
 |
39.6 |
31.8 |
27.0 |
7.9 |
69.5 |
42.0 |
29.3 |
M5 on 55.9 BHC |
M16x45 |
21.4 |
280.00 |
44,500 |
38052 |
| 38350 |
#6 |
 |
39.6 |
31.8 |
27.0 |
7.9 |
75.5 |
51.5 |
29.3 |
M5 on 63.9 BHC |
M16x45 |
21.4 |
280.00 |
44,500 |
38052 |
| 38400 |
#7 |
 |
45.5 |
37.6 |
32.3 |
7.9 |
107.5 |
77.7 |
29.3 |
M6 on 92.6 BHC |
M16x50 |
19.3 |
280.00 |
44,500 |
38072 |
| 38450 |
#8 |
 |
45.5 |
37.6 |
32.3 |
7.9 |
132.9 |
103.0 |
29.3 |
M6 on 118.06 BHC |
M16x50 |
19.3 |
280.00 |
44,500 |
38072 |
| 38500 |
#9 |
 |
45.5 |
37.6 |
32.3 |
7.9 |
132.9 |
175.0 |
29.3 |
M6 on 118.06 BHC |
M16x50 |
19.3 |
280.00 |
44,500 |
38072 |
| 38550** |
#10 |
 |
45.5 |
37.6 |
32.3 |
7.9 |
152.4 |
250.2 |
29.3 |
M6 on 133.35 BHC |
M16x50 |
19.3 |
170.00 |
26,000 |
38072 |
G+ Minimum diameter the “F” dimension can be machined or turned down to.
H* – (3) Mounting Screws Included. (4) Mounting Screws Included with #9 & #10.
** – Clamp made from 7075-T6 aluminum stock.
| MODEL #00 – #6 ID Xpansion™ Clamps |
|
- Expand clamp approximately .1mm over relaxed diameter and machine to fit workpiece bore, either on lathe or mill.
- If machining the clamp on a lathe use the nut provided, on the back of the clamp, to tighten the tapered screw. This nut is used only while machining the clamp.
- Machine a pocket in the fixture, for the close tolerance “E” dimension and drill and tap mounting holes per “H” column. Drill and tap a hole from the “I” column in the center of the pocket for the tapered screw.
- A recessed dowel pin may be installed into the flange for additional rigidity if required.
- Custom screws available for blind hole applications.
- Range of expansion .13 to .64mm depending upon size.
|
| MODEL #7-10 ID Xpansion™ Clamps |
- Locking ring provided to ensure segments remain rigid while machining clamps to size. #10 ID ships with 2 rings.
- Insert ring(s) and tighten drive screw, machine clamp to bore size. Remove ring(s) to clamp workpiece.
- Expand mandrel then machine to size.
- Aggressive material removal is not recommended when machining clamps to size.
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