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32 Products

Taper-Mount Keyed Drill Chucks

Heavy Duty

Jacobs Taper

Mount

Secure bits into your drill press, milling machine, or lathe. These chucks are keyed, so they grip bits tightly to prevent slipping under heavy loads. Use the included key to tighten and loosen the jaws. Attach these chucks to your machine with a Jacobs taper arbor. To maximize grip and minimize runout, choose a chuck where your drill bit diameter falls in the middle of the bit shank size range.

Jacobs—Jacobs chucks are the most widely used drill chucks.

McMaster-Carr Approved—McMaster-Carr approved chucks are made on the same equipment that once produced Jacobs chucks in Europe, so you get high-quality performance without the brand-name price.

Ball Bearing—Chucks with ball bearings produce less friction for the best grip on bits. Use them for tight tolerance drilling to make accurate holes. They’re also known as super chucks.

Heavy Duty—Heavy duty chucks give you the rigidity and heft needed for high-torque drilling in hardened metal. Their extra mass means they resist vibration and fluctuating cutting forces to keep your bit stable. While they share all of the same features as medium duty chucks—one-piece sleeve, center-ground jaws, and hardened wear points—they grip bits tighter and stay accurate longer under heavy loads.

	Drill Chucks														Replacement Sleeves		Service Kits
						Chuck Key
	Machine Taper No.	For Bit Shank Size	Duty Rating	Wt., lb.	Total Indicated Runout (TIR) Accuracy	Included	No.	Jaw Material	Body Material	For Use With	For Tool Drive Direction	Mfr. Model No.		Each		Each		Each
McMaster-Carr Approved—Ball Bearing



		Jacobs 3	0.04" to 1/2" 1 mm to 13 mm	Heavy	2.1	0.003"	Yes	K3	Steel	Steel	Drill Presses Lathes Milling Machines	Clockwise, Counterclockwise	—	9776N11	0000000	———	0	———	0


		Jacobs 3	1/16" to 5/8" 1.6 mm to 16 mm	Heavy	2.7	0.003"	Yes	K4	Steel	Steel	Drill Presses Lathes Milling Machines	Clockwise, Counterclockwise	—	9776N2	000000	———	0	———	0
		Jacobs 4	1/8" to 3/4" 3 mm to 19 mm	Heavy	4	0.003"	Yes	K4	Steel	Steel	Drill Presses Lathes Milling Machines	Clockwise, Counterclockwise	—	9776N13	000000	———	0	———	0
		Jacobs 5	13/64" to 1" 5.2 mm to 25.4 mm	Heavy	7.1	0.003"	Yes	K5	Steel	Steel	Drill Presses Lathes Milling Machines	Clockwise, Counterclockwise	—	9776N14	000000	———	0	———	0


		Jacobs—Ball Bearing



				Jacobs 2	0.04" to 1/4" 1 mm to 6.5 mm	Heavy	0.7	0.003"	Yes	K30	Steel	Steel	Drill Presses Lathes Milling Machines	Clockwise, Counterclockwise	8 1/2N	2815A11	000000	———	0	2815A41	0000000


				Jacobs 2	0.04" to 3/8" 1 mm to 10 mm	Heavy	1.3	0.003"	Yes	K32	Steel	Steel	Drill Presses Lathes Milling Machines	Clockwise, Counterclockwise	11N	2815A12	000000	2815A25	000000	2815A42	000000
				Jacobs 3	0.04" to 1/2" 1 mm to 13 mm	Heavy	2.4	0.003"	Yes	K3	Steel	Steel	Drill Presses Lathes Milling Machines	Clockwise, Counterclockwise	14N	2815A13	000000	2815A26	00000	2815A43	000000
				Jacobs 3	1/8" to 5/8" 3 mm to 16 mm	Heavy	3.3	0.003"	Yes	K4	Steel	Steel	Drill Presses Lathes Milling Machines	Clockwise, Counterclockwise	16N	2815A14	000000	2815A27	000000	2815A44	000000
				Jacobs 4	1/8" to 3/4" 3 mm to 19 mm	Heavy	4.6	0.003"	Yes	K4	Steel	Steel	Drill Presses Lathes Milling Machines	Clockwise, Counterclockwise	18N	2815A15	000000	2815A28	000000	2815A45	000000
				Jacobs 5	3/8" to 1" 10 mm to 25.4 mm	Heavy	7.9	0.003"	Yes	K5	Steel	Steel	Drill Presses Lathes Milling Machines	Clockwise, Counterclockwise	20N	2815A16	000000	———	0	2815A46	000000

Jaw and Nut Kits for Jacobs Keyed Drill Chucks

Replace worn components to extend the life of your Jacobs keyed drill chuck.

Jaw and Nut Sets

For Jacobs Chuck Mfr. Model No.		Each
3A, 3B 1/2, 3B 5/8, 3KD, 3PD	2812A86	000000
33, 33BA 1/2, 33BA 3/8, 33BA 5/8, 33KD, 33KDS, 3326A, 3326E	2812A87	00000
34-02, 34-06, 34-33, 34-33C, 34PD	2812A88	00000
36, 36B 3/4, 36B 5/8, 36KD, 36PD	2812A89	000000

Service Kits

Service kits are for heavy duty ball bearing chucks. Each kit includes jaws, split nuts, a thrust bearing, and a washer. When choosing from these kits, check the nose of your chuck for a service number. Older chucks don't have a service kit number—choose kits with a number not included.

	Service Kit Number Included		Service Kit Number Not Included
For Jacobs Chuck Mfr. Model No.		Each		Each
8 1/2N	2815A41	0000000	———	0
11N	2815A42	000000	2815A52	0000000
14N	2815A43	000000	2815A53	000000
16N	2815A44	000000	2815A54	000000
18N	2815A45	000000	2815A55	000000
20N	2815A46	000000	2815A56	000000

Sleeves for Jacobs Keyed Drill Chucks

Replace worn components to extend the life of your Jacobs keyed drill chuck.

For Jacobs Chuck Mfr. Model No.		Each
11N	2815A25	000000
14N	2815A26	00000
16N	2815A27	000000
18N	2815A28	000000
33, 33BA 1/2, 33BA 3/8, 33BA 5/8, 33KD, 33KDS, 3326A, 3326E	2812A92	00000
34-02, 34-06, 34-33, 34-33C	2812A93	00000
36, 36B 3/4, 36B 5/8, 36KD, 36PD	2812A94	00000