9.7 mm ID Bearings | McMaster-Carr

When shoulders come up short, use these shims to extend the shoulder length on your screw. Wiggle the shims over the threads and up to the existing shoulder to create the exact shoulder length you need. Use them to create more space for bearings, pulleys, and sprockets, or extend the length of travel along the shoulder.

You can stack multiple shims to achieve the exact shoulder length or space you need.

18-8 Stainless Steel—The choice for wet and outdoor environments, these shims resist rust. However, they’ll corrode or pit when exposed to salt water and chemicals.

Highly Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these shims won't degrade when exposed to harsh weather, salt water, and most chemicals.

	ID, mm	ID Tolerance, mm	OD, mm	OD Tolerance, mm	Min. Hardness	Pkg. Qty.		Pkg.
18-8 Stainless Steel







	For 12 mm Diameter Shoulder

	0.005"	-0.0005" to 0.0005"	M10	9.7	0 to 0.25	11.96	-0.25 to 0	Rockwell C40	10	91437A508	000000


	0.01"	-0.001" to 0.001"	M10	9.7	0 to 0.25	11.96	-0.25 to 0	Rockwell C40	10	91437A511	00000
	0.015"	-0.001" to 0.001"	M10	9.7	0 to 0.25	11.96	-0.25 to 0	Rockwell C40	10	91437A517	00000
	0.02"	-0.0015" to 0.0015"	M10	9.7	0 to 0.25	11.96	-0.25 to 0	Rockwell C40	10	91437A522	00000
	0.025"	-0.0015" to 0.0015"	M10	9.7	0 to 0.25	11.96	-0.25 to 0	Rockwell C40	10	91437A526	00000
	0.031"	-0.002" to 0.002"	M10	9.7	0 to 0.25	11.96	-0.25 to 0	Rockwell C40	10	91437A532	00000


	Highly Corrosion-Resistant 316 Stainless Steel







					For 12 mm Diameter Shoulder

					0.015"	-0.001" to 0.001"	M10	9.7	0 to 0.25	11.96	-0.25 to 0	Rockwell B70	10	94141A210	00000


					0.031"	-0.002" to 0.002"	M10	9.7	0 to 0.25	11.96	-0.25 to 0	Rockwell B70	10	94141A260	00000

Metric Press-Fit Drill Bushings

Also known as jig bushings, these metric drill bushings fit inside fixture plate holes to precisely guide drill bits, counterbores, reamers, and other cutting tools. They improve accuracy so that your drilled holes and cuts are consistent from part to part. Known for their versatility, drill bushings are also used as spacers, shims, and machinery bushings. These bushings are made of hardened, ground steel that holds its shape and resists wear, so they last for many cycles without needing to be replaced.

All bushings have a chamfer on the outside that centers the bushing as you place it into the hole. Press into place with a manual or hydraulic press. Since the bushing is sized slightly larger than the hole for an extremely tight fit, it’ll stay put permanently. These are ANSI Type PM bushings—also known as headless bushings—which means you don’t need to counterbore the hole to mount them flush.

They also have an internal chamfer that makes it easy to insert bits, pins, and punches without damaging the bushing or misaligning tools.

Don't see the size you need? Additional sizes are available.

DIN 179—DIN 179 bushings meet dimensional and material standards that make sure they're compatible with other parts and tools. Although DIN 179 is no longer an active standard, it's still a common reference point for designers.

						Tolerance, mm								Each
	OD, mm	Lg., mm	Internal Chamfer	For Drill Bit Size, mm	For Drill Bit Size Decimal Equiv.	ID	OD	Lg.	Drill Bushing Type	Material	Hardness	Specs. Met		1-5	6-11	12-Up
9.7 mm ID



		15	20	One End	9.7	0.3819"	0.013 to 0.028	0.012 to 0.023	-0.2 to 0.2	PM	Steel	Rockwell C61	DIN 179	96990A335	000000	000000	00000

Metric Press-Fit Drill Bushings with Head


Shown in Countersunk Hole	Shown in Standard Hole

Even under extreme drilling pressure, these metric bushings won't press through your jig plate. They’re ANSI Type H bushings, also known as headed bushings. A flanged head acts as a stop, so these bushings won’t move as you push down your drill bit, reamer, or other cutting bit. Use them even in jigs made of thin or soft materials—the head adds support to protect your jig from damage caused by heavy use. Drill bushings ensure accurate, consistent cuts and drilled holes from one part to the next. They’re also used as spacers, shims, and machinery bushings. Made of hardened, ground steel, these bushings hold their shape and resist wear, so they last for many cycles without needing to be replaced.

These bushings meet DIN 172 dimensional standards. This standard is no longer active, but it’s often used as a reference point for making sure parts are compatible with other parts and tools.

To install, fit the bushing into a hole in your jig. In a standard hole, the head will sit above the jig plate; to mount flush, install in a countersunk hole. A chamfered edge on the bottom of the bushing helps center the bushing in the hole. Once it’s centered, press the bushing into the hole with a hydraulic or lever press.

					Head, mm		Tolerance, mm								Each
	OD, mm	Lg., mm	For Drill Bit Size, mm	For Drill Bit Size Decimal Equiv.	OD	Thk.	ID	OD	Lg.	Drill Bushing Type	Material	Hardness	Specs. Met		1-5	6-11	12-Up
9.7 mm ID



		15	17	9.7	0.3819"	18	3	0.013 to 0.028	0.012 to 0.023	-0.2 to 0.2	H	Steel	Rockwell C61	DIN 172	96977A352	000000	000000	00000


		15	22	9.7	0.3819"	18	3	0.013 to 0.028	0.012 to 0.023	-0.2 to 0.2	H	Steel	Rockwell C61	DIN 172	96977A353	00000	00000	00000