0.302" ID Bearings | McMaster-Carr

Also known as jig bushings, these drill bushings fit inside fixture plate holes to precisely guide drill bits, counterbores, reamers, and other cutting tools. They improve accuracy so 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.

Press into place with a manual or hydraulic press. Since these bushings are sized slightly larger than the hole for an extremely tight fit, they’ll stay put permanently. These are ANSI Type P bushings—also known as headless bushings—which means you don’t need to counterbore the hole to mount them flush.

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

					Tolerance							Each
	OD	Lg.	For Drill Bit Size	For Drill Bit Size Decimal Equiv.	ID	OD	Lg.	Drill Bushing Type	Material	Hardness		1-9	10-49	50-Up
0.302" ID



		1/2"	5/16"	N	0.302"	0.0001" to 0.0005"	0.0014" to 0.0017"	-0.01" to 0.01"	P	Steel	Rockwell C61	98042A011	00000	00000	00000


		1/2"	3/8"	N	0.302"	0.0001" to 0.0005"	0.0014" to 0.0017"	-0.01" to 0.01"	P	Steel	Rockwell C61	98042A012	0000	0000	0000
		1/2"	1/2"	N	0.302"	0.0001" to 0.0005"	0.0014" to 0.0017"	-0.015" to 0.015"	P	Steel	Rockwell C61	8491A147	00000	00000	00000
		1/2"	3/4"	N	0.302"	0.0001" to 0.0005"	0.0014" to 0.0017"	-0.015" to 0.015"	P	Steel	Rockwell C61	8491A148	00000	00000	00000
		1/2"	1"	N	0.302"	0.0001" to 0.0005"	0.0014" to 0.0017"	-0.01" to 0.01"	P	Steel	Rockwell C61	98042A013	0000	0000	0000
		9/16"	3/8"	N	0.302"	0.0001" to 0.0005"	0.0014" to 0.0017"	-0.01" to 0.01"	P	Steel	Rockwell C61	98042A016	0000	0000	0000
		9/16"	1/2"	N	0.302"	0.0001" to 0.0005"	0.0014" to 0.0017"	-0.01" to 0.01"	P	Steel	Rockwell C61	98042A017	0000	0000	0000
		9/16"	3/4"	N	0.302"	0.0001" to 0.0005"	0.0014" to 0.0017"	-0.01" to 0.01"	P	Steel	Rockwell C61	98042A018	0000	0000	0000
		9/16"	1"	N	0.302"	0.0001" to 0.0005"	0.0014" to 0.0017"	-0.01" to 0.01"	P	Steel	Rockwell C61	98042A019	00000	0000	0000

Removable Drill Bushings

Replace worn bushings and quickly change IDs without needing to repeatedly use a lever press. Instead of pressing bushings in and out of your jig fixture, which can cause damage, these bushings slide in and out of sleeves (sold separately). By swapping in a bushing with a different ID, you can change the size of your bit and still use the same hole in your fixture. All are made to tight dimensional tolerances for consistent, accurate results, even as you change them in and out. They're also known as slip-fixed and renewable bushings.

Choose a sleeve with a length that matches the length of your bushing. To prevent bushings from spinning inside the sleeve as you drill, pair a standard sleeve with a lock screw, or use a locking sleeve. For faster placement in and removal from sleeves, use a handle.

					Head			Tolerance							Each
	OD	Lg.	For Drill Bit Size	For Drill Bit Size Decimal Equiv.	OD	Thk.	Lock Screw/Bushing Ctr.-to-Ctr.	ID	OD	Lg.	Drill Bushing Type	Material	Hardness		1-5	6-11	12-Up
0.302" ID



		1/2"	1/2"	N	0.302"	51/64"	1/4"	5/8"	0.0001" to 0.0005"	-0.0002" to 0"	-0.015" to 0.015"	SF	Steel	Rockwell C61	8493A044	000000	000000	000000

Accessories for Drill Bushings

Drill Bushing Lock Screws


Slotted Drive	Hex Drive

Lock screws thread into a hole in your jig. The head of the screw fits into a notch on the bushing's head, which keeps the bushing from spinning.

						Shoulder
	For Bushing OD	Thread Size	Head OD	Overall Lg.	Head-to-Shoulder Lg.	Lg.	Wd.	Hex Size	For Drill Bushing Type	Material	Pkg. Qty.		Pkg.
Slotted Drive



		5/16", 1/2", 3/4"	5/16"-18	5/8"	5/8"	1/4"	0.138"	3/8"	—	SF	Steel	10	8496A13	000000


		Hex Drive



				5/16", 1/2", 3/4"	5/16"-18	5/8"	5/8"	1/4"	0.138"	3/8"	3/16"	SF	Steel	10	8496A31	00000

For Bushing OD	ID	OD	Lg.	ID Tolerance	For Drill Bushing Type	Material	Hardness	Sleeve ANSI No.		Each
1/2"	1/2"	3/4"	1/2"	0.0002" to 0.0005"	SF	Steel	Rockwell C61	L-48-8	3556N157	00000

Drill Bushing Lock Sleeves


	Smooth

Lock sleeves act as a sleeve and lock screw at the same time. They have a raised flange that fits into the notch on the bushing's head, keeping the bushing in place.

Smooth—Smooth sleeves are slightly oversized for a snug fit. They’re usually installed in metal tooling—press them into place with a manual or hydraulic press.

										Smooth
For Bushing OD	ID	OD	Lg.	Head Dia.	Flange Distance	ID Tolerance	For Drill Bushing Type	Material	Hardness		Each
1/2"	1/2"	3/4"	47/64"	13/16"	1/2"	0.0002" to 0.0005"	SF	Steel	Rockwell C61	31425A22	000000

Press-Fit Drill Bushings with Head


Shown in Countersunk Hole	Shown in Standard Hole

A flanged head on these bushings acts as a stop, so they won’t press through your jig even under extreme drilling pressure. They’re ANSI Type H bushings, also known as headed bushings. The head adds support and protects the jig from damage caused by heavy use, so they’re often used in jigs made of thin or soft materials. These bushings guide your drill bit, reamer, or other cutting bit to create accurate, consistent holes from one workpiece to the next. They’re also used as spacers, shims, and machinery bushings. Made of hardened, ground steel, they hold their shape and resist wear, so they last for many cycles without needing to be replaced.

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 place with a hydraulic or lever press.

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

					Head		Tolerance							Each
	OD	Lg.	For Drill Bit Size	For Drill Bit Size Decimal Equiv.	OD	Thk.	ID	OD	Lg.	Drill Bushing Type	Material	Hardness		1-5	6-11	12-Up
0.302" ID



		1/2"	1/2"	N	0.302"	39/64"	7/32"	0.0001" to 0.0005"	0.0014" to 0.0017"	-0.01" to 0.01"	H	Steel	Rockwell C61	8492A546	00000	00000	00000