ID Xpansion Clampler

The ID Xpansion™ clamp is the ideal solution for holding parts on an inner diameter for high-load machining on vertical or horizontal machining centers. It can also be used as an expanding mandrel on lathes.

These machinable clamplers are manufactured in 12 sizes, made from black oxide coated 12L14 steel and can hold inner diameters from 4.1mm to 254mm. The #10 product is manufactured using 7075-T6 aluminum.

The clamping flange diameter provides a precise tolerance for clamping by being positioned with the pocket machined on cubic parts and fixture plates.

The customer machines the soft steel clamper to fit the part, providing an accurate clearance. The clamper can generally be re-machined for different sized jobs.

The low profile ID Xpansion™ Clamp can hold several parts in a compact area for second operations without any clamping interface obstruction. It can be easily tightened via an Allen wrench or interfaced with hydraulic draw cylinders for automation.

Low Profile
Ideal for Secondary Operations on Lathe Parts
Easily Machined on Lathe or Mill
Excellent for Palletized Setups
Allows for more parts per workcube or fixture plate.
Heat Treated and Coated Screw for Long Life
Clamp Body Made from Mild Steel for Machinability
Tighten with a hex key or hydraulic pull cylinders (drill clearance hole for long bolt in the cylinder)
Longer Screws Available for Hydraulic Applications
Longer Tapered Screws Available for Each ID Size

Clamp Machining and Assembly

Inch

Part number	Model Number	A	B	C	D	E + .000 -, 002	F	G +	H *	I	J	Torque (Ft / lbs.)	Holding force (lbs)	Spare Taper Screws
31000	# 00	CAD	.42	.30	0,24	0,12	0,787	0,29	0,16	2-56 on .540 BHC	2-56 x 1/4	0,16	0.5	250	31001
31050	# 0	CAD	0,86	0,63	0,59	0,23	1,170	0,49	.28	6-32 on .825 BHC	8-32 x 1	.30	3.6	950	31002
31100	1.	CAD	0,98	.75	0,59	0,23	1,240	.56	0,48	6-32 on .910 BHC	1 / 4-20 x 1 1/4	.50	13.3	1.900	31010
31150	2.	CAD	0,98	.75	0,59	0,23	1,476	.79	0,53	6-32 on 1.140 BHC	5 / 16-18 x 1 1/4	.56	27.6	2.500	31020
31200	3.	CAD	1.13	.88	.69	0,25	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.	CAD	1.25	1.0	0,81	0,25	2,205	1.39	.90	8-32 on 1,790 BHC	1 / 2-13 x 1 1/2	.71	120.0	5900	31042
31300	5.	CAD	1.56	1.25	1.06	0,31	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.	CAD	1.56	1.25	1.06	0,31	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.	CAD	1.79	1.48	1.27	0,31	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.	CAD	1.79	1.48	1.27	0,31	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.	CAD	1.79	1.48	1.27	0,31	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.	CAD	1.79	1.48	1.27	0,31	6.000	9.85	1.15	1 / 4-20 on 5.250 BHC	5 / 8-11 x 2	.79	125.0	6000	31072

G + Minimum diameter can be machined or turned down to size “F”.
H * – Includes (3) Mounting Screws. Supplied with Mounting Screws for #9 and #10.
** – Clamp made from 7075-T6 aluminum.

ID Xpansion ™ Clamp Machining and Setup

MODEL # 00 – # 6 ID Xpansion ™ Clamps

Expand the assembly approximately 0.002 to 0.003 over the relaxed diameter and machine to fit the workpiece bore on the lathe or mill.
If machining the clamp in a lathe, use the nut on the back of the clamp to tighten the tapered screw. This nut is only used in the machining of the clamp.
For close tolerance on “E” dimension and drill and tap mounting holes per “H” column, machine a pocket in the fixture. Drill and tap a hole from the “I” column in the center of the pocket for the tapered screw.
A countersunk dowel pin can be installed in the flange for additional rigidity if needed.
Special screws for blind hole applications.
Expansion range .005 to .025 depending on width.

MODEL # 7-10 ID Xpansion ™ Clamps

A locking ring is provided to ensure parts remain rigid when sizing the clamps. # 10 ID ships with 2 rings.
Install ring(s) and tighten drive screw, machine clamp to bore size. Remove rings for clamping workpiece.
Expand mandrel, then machine to size.
Aggressive material removal is not recommended when machining clamps to size.