38 Teeth Sprockets | McMaster-Carr

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Number of Teeth

Roller Chain Trade Number

08B

08B-2

System of Measurement

Shaft Diameter

Pitch

Strand Type

Bore Type

Shaft Type

Chain Type

Hub Diameter

Keyway Depth

Shaft Mount Type

Overall Width

Chain Standard

Width

Material

Component

Keyway Width

REACH

RoHS

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

Sprocket Type

Bushing Trade Number

84 Products

Sprockets


For Single Strand	For Double Strand

Sprocket teeth mesh with your roller chain to smoothly transmit power. These U.S.-made sprockets have machined teeth for a more precise fit than flame-cut or punched teeth, allowing them to glide in and out of the chain to reduce wear and extend chain life.

Steel—Steel is strong, but best for dry environments since moisture will cause it to rust.

Finished Bore—Mount these sprockets onto your shaft and secure with a set screw—no machining required.

Plain Bore—Plain bore sprockets give you options—machine a custom bore, weld, or press-fit them in place. They're sized to the minimum shaft diameter listed and are machinable up to the maximum.

	For Roller Chain							Keyway
	Trade No.	Std.	Pitch	No. of Teeth	OD	Bore Type	For Shaft Dia.	Wd.	Dp.		Each
For Single Strand







				Steel

				40	ANSI	1/2"	38	6 5/16"	Finished	5/8"	3/16"	3/32"	00000000	000000


				40	ANSI	1/2"	38	6 5/16"	Finished	3/4"	3/16"	3/32"	00000000	00000
				40	ANSI	1/2"	38	6 5/16"	Finished	7/8"	3/16"	3/32"	00000000	00000
				40	ANSI	1/2"	38	6 5/16"	Finished	1"	1/4"	1/8"	00000000	00000
				40	ANSI	1/2"	38	6 5/16"	Finished	1 1/8"	1/4"	1/8"	00000000	00000
				40	ANSI	1/2"	38	6 5/16"	Finished	1 3/16"	1/4"	1/8"	00000000	00000
				40	ANSI	1/2"	38	6 5/16"	Finished	1 1/4"	1/4"	1/8"	00000000	00000
				40	ANSI	1/2"	38	6 5/16"	Finished	1 3/8"	5/16"	5/32"	00000000	00000
				40	ANSI	1/2"	38	6 5/16"	Finished	1 7/16"	3/8"	3/16"	00000000	00000
				40	ANSI	1/2"	38	6 5/16"	Finished	1 1/2"	3/8"	3/16"	00000000	00000
				50	ANSI	5/8"	38	7 15/16"	Finished	3/4"	3/16"	3/32"	00000000	000000


				50	ANSI	5/8"	38	7 15/16"	Finished	7/8"	3/16"	3/32"	00000000	000000
				50	ANSI	5/8"	38	7 15/16"	Finished	1"	1/4"	1/8"	00000000	000000
				50	ANSI	5/8"	38	7 15/16"	Finished	1 1/8"	1/4"	1/8"	00000000	000000
				50	ANSI	5/8"	38	7 15/16"	Finished	1 3/16"	1/4"	1/8"	00000000	000000
				50	ANSI	5/8"	38	7 15/16"	Finished	1 1/4"	1/4"	1/8"	00000000	000000
				50	ANSI	5/8"	38	7 15/16"	Finished	1 3/8"	5/16"	5/32"	00000000	000000
				50	ANSI	5/8"	38	7 15/16"	Finished	1 7/16"	3/8"	3/16"	00000000	000000
				50	ANSI	5/8"	38	7 15/16"	Finished	1 1/2"	3/8"	3/16"	00000000	000000
				50	ANSI	5/8"	38	7 15/16"	Finished	1 5/8"	3/8"	3/16"	00000000	000000
				50	ANSI	5/8"	38	7 15/16"	Finished	1 3/4"	3/8"	3/16"	00000000	000000


				50	ANSI	5/8"	38	7 15/16"	Finished	1 15/16"	1/2"	1/4"	00000000	000000
				60	ANSI	3/4"	38	9 1/2"	Finished	1"	1/4"	1/8"	00000000	000000
				60	ANSI	3/4"	38	9 1/2"	Finished	1 1/8"	1/4"	1/8"	00000000	000000
				60	ANSI	3/4"	38	9 1/2"	Finished	1 3/16"	1/4"	1/8"	00000000	000000
				60	ANSI	3/4"	38	9 1/2"	Finished	1 1/4"	1/4"	1/8"	00000000	000000
				60	ANSI	3/4"	38	9 1/2"	Finished	1 3/8"	5/16"	5/32"	00000000	000000
				60	ANSI	3/4"	38	9 1/2"	Finished	1 7/16"	3/8"	3/16"	00000000	000000
				60	ANSI	3/4"	38	9 1/2"	Finished	1 1/2"	3/8"	3/16"	00000000	000000
				60	ANSI	3/4"	38	9 1/2"	Finished	1 5/8"	3/8"	3/16"	00000000	000000
				60	ANSI	3/4"	38	9 1/2"	Finished	1 3/4"	3/8"	3/16"	00000000	000000


				60	ANSI	3/4"	38	9 1/2"	Finished	1 15/16"	1/2"	1/4"	00000000	000000
				60	ANSI	3/4"	38	9 1/2"	Finished	2"	1/2"	1/4"	00000000	000000
				60	ANSI	3/4"	38	9 1/2"	Finished	2 3/16"	1/2"	1/4"	00000000	000000
				60	ANSI	3/4"	38	9 1/2"	Finished	2 7/16"	5/8"	5/16"	00000000	000000


				For Double Strand







								Steel

08B-2								ISO	1/2"	38	161 mm	Plain	20 mm to 73 mm	—	—	00000000	000000

Taper-Lock Bushing-Bore Sprockets


Sprocket Shown with Bushing (Sold Separately)	For Single Strand

Quickly swap or service parts in tight spaces—no press-fitting or special tools required. Taper-lock bushings mount flush inside the sprocket hub for a slim profile. Mount a bushing (sold separately) on your shaft, slide the sprocket over it, and tighten the included set screws. As you tighten, the bushing grips the shaft and pulls it into your sprocket for a secure hold.

Steel—Steel is strong, but best for dry environments since moisture will cause it to rust.

	For Roller Chain
	Trade No.	Std.	Pitch	No. of Teeth	OD, mm	For Bushing Trade No.		Each
For Single Strand







				Steel

				08B	ISO	1/2"	38	161	1610	00000000	0000000

Bushings

Taper-Lock

Bushing

	For Shaft Dia.		Each
Taper-Lock Bushing



	1610	1/2"	000000000	000000


	1610	5/8"	000000000	00000
	1610	3/4"	000000000	00000
	1610	13/16"	000000000	00000
	1610	7/8"	000000000	00000
	1610	15/16"	000000000	00000
	1610	1"	000000000	00000
	1610	1 1/16"	000000000	00000
	1610	1 1/8"	000000000	00000
	1610	1 3/16"	000000000	00000
	1610	1 1/4"	000000000	00000


	1610	1 5/16"	000000000	00000
	1610	1 3/8"	000000000	00000
	1610	1 7/16"	000000000	00000
	1610	1 1/2"	000000000	00000
	1610	1 9/16"	000000000	00000
	1610	1 5/8"	000000000	00000
	1610	1 11/16"	000000000	00000
	1610	14 mm	000000000	00000
	1610	16 mm	000000000	00000
	1610	18 mm	000000000	00000


	1610	19 mm	000000000	00000
	1610	20 mm	000000000	00000
	1610	22 mm	000000000	00000
	1610	24 mm	000000000	00000
	1610	25 mm	000000000	00000
	1610	28 mm	000000000	00000
	1610	30 mm	000000000	00000
	1610	32 mm	000000000	00000
	1610	35 mm	000000000	00000
	1610	38 mm	000000000	00000

Metal Spur Gears

Our strongest spur gears for transferring motion. They’re better than plastic gears for high-load, high-speed, and heavy duty applications. Combine a gear and rack to convert rotary motion into linear motion. To minimize your footprint, mount one or more standard gears inside of an internal gear.

Combine gears with different numbers of teeth to change speed and torque in your assembly. For components to mesh correctly, they must have the same pressure angle and pitch/module.

Gears

20° Pressure Angle

Round Bore

20° Pressure Angle—The current industry standard, these 20° pressure angle spur gears have thicker, stronger teeth than 14½° pressure angle gears.

Steel—Steel gears have hard, strong, and wear-resistant teeth, although they will rust when exposed to moisture and corrosive chemicals.

						Hub, mm
	Gear Module	No. of Teeth	Gear Pitch Dia., mm	OD, mm	Face Wd., mm	Dia.	Wd.	Bore Type	For Shaft Dia., mm	Tooth Heat Treatment	Material		Each
20° Pressure Angle







				Steel

				1	38	38	40	10	32	10	Round Bore	10	Not Hardened	Black-Oxide 1045 Carbon Steel	00000000	000000


				2	38	76	80	20	55	10	Round Bore	12	Not Hardened	Black-Oxide 1045 Carbon Steel	00000000	00000

Gear Racks


20° Pressure Angle—Rectangular	20° Pressure Angle—Round

These racks match with spur gears to convert rotary motion to linear motion. For components to mesh correctly, they must have the same pressure angle and pitch/module.

Steel—Steel gear racks have strong and wear-resistant teeth, although they will rust when exposed to moisture and corrosive chemicals.

	Ht., mm	Face Wd., mm	Dia., mm	Tooth Heat Treatment	Material	Features		Each
20° Pressure Angle—Rectangular







	Steel

	1	100	11	12	10	—	Not Hardened	Black-Oxide 1045 Carbon Steel	—	00000000	000000


	1	300	11	12	10	—	Not Hardened	Black-Oxide 1045 Carbon Steel	—	00000000	00000
	1	500	8.8	9.8	10	—	Not Hardened	1045 Carbon Steel	—	00000000	00000
	1	1,000	8.8	9.8	10	—	Not Hardened	1045 Carbon Steel	—	00000000	000000
	2	100	23	25	20	—	Not Hardened	Black-Oxide 1045 Carbon Steel	—	00000000	00000
	2	300	23	25	20	—	Not Hardened	Black-Oxide 1045 Carbon Steel	—	00000000	00000
	2	500	17.8	19.8	20	—	Not Hardened	1045 Carbon Steel	—	00000000	000000
	2	1,000	17.8	19.8	20	—	Not Hardened	1045 Carbon Steel	—	00000000	000000
	2	1,000	18	20	20	—	Not Hardened	Black-Oxide 1045 Carbon Steel	Machined Ends	00000000	000000


	20° Pressure Angle—Round







					Steel

					1	500	9	—	—	10	Not Hardened	Black-Oxide 1045 Carbon Steel	—	00000000	000000


					2	1,000	18	—	—	20	Not Hardened	Black-Oxide 1045 Carbon Steel	—	00000000	000000

Internal Gears

Image of Product. Front orientation. Internal Spur Gears. Metal Spur Gears.

Save space without losing power. Insert a standard spur gear inside one of these gears for a compact assembly that smoothly transmits motion. Combine gears with different numbers of teeth to change speed and torque in your assembly. For components to mesh correctly, they must have the same pressure angle and pitch/module.

Steel—Steel gears have strong and wear-resistant teeth, although they will rust when exposed to moisture and corrosive chemicals.

	OD, mm	ID, mm	Face Wd., mm	Tooth Heat Treatment	Finished Material		Each
20° Pressure Angle







	Steel

	1	60	60	90	58	10	Not Hardened	Black-Oxide 1045 Carbon Steel	0000000	000000


	1	100	100	130	98	10	Not Hardened	Black-Oxide 1045 Carbon Steel	0000000	000000
	2	100	200	250	196	20	Not Hardened	Black-Oxide 1045 Carbon Steel	0000000	000000