27 Teeth Sprockets | McMaster-Carr

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	Roller Chain Trade Size Roller Chain Trade Size

06B

06B-2

08B

	System of Measurement System of Measurement

Inch

Metric

	For Shaft Diameter For Shaft Diameter

	Pitch Pitch

0.500"

9.53 mm

12.70 mm

	For Roller Chain Strand Type For Roller Chain Strand Type


Single	Double

	OD OD

	Material Material

Steel

Iron

	Bore Type Bore Type


Finished	Machinable

Plain

	For Shaft Type For Shaft Type

Keyed

Round

	Sprocket Type Sprocket Type

Standard

	ID ID

	Overall Width Overall Width

8mm

28 mm

30mm

	For Maximum Shaft Diameter For Maximum Shaft Diameter

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Roller Chain Standard Roller Chain Standard

ANSI

ISO

DIN

	Hub Diameter Hub Diameter

	Specifications Met Specifications Met

ISO

DIN

	Shaft Mount Type Shaft Mount Type

Set Screw

Press Fit

	Keyway Depth Keyway Depth

3/32"

1/8"

	Keyway Width Keyway Width

3/16"

1/4"

	For Maximum Belt Width For Maximum Belt Width

40 mm

55 mm

85 mm

	Width Width

1 5/8"

2 5/16"

3 1/2"

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11 Products

About Roller Chain and Sprockets

With Keyway

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

For technical drawings and 3-D models, click on a part number.

For ANSI 41 Roller Chain (1/2" Pitch)

					Keyway
Number of Teeth	For Shaft Dia.	OD	Overall Wd.	Hub Dia.	Wd.	Dp.	Material	Includes		Each
27	5/8"	4.58"	1"	3 1/4"	3/16"	3/32"	Steel	Two Set Screws	00000000	000000
27	3/4"	4.58"	1"	3 1/4"	3/16"	3/32"	Steel	Two Set Screws	00000000	00000
27	7/8"	4.58"	1"	3 1/4"	3/16"	3/32"	Steel	Two Set Screws	00000000	00000
27	1"	4.58"	1"	3 1/4"	1/4"	1/8"	Steel	Two Set Screws	00000000	00000

Sprockets for Metric Roller Chain

Designed to meet ISO 606 and DIN 8187 international dimensional standards, these sprockets are for use with compatible ISO and DIN roller chain. They come machined to the shaft diameter size listed and are machinable up to the maximum shaft diameter size.

For technical drawings and 3-D models, click on a part number.

For DIN, ISO 06B Roller Chain (9.53 mm Pitch)
Number of Teeth	For Shaft Dia., mm	For Max. Shaft Dia., mm	OD, mm	Overall Wd., mm	Hub Dia., mm	Material	Specifications Met		Each
27	12	38	86	28	60	Steel	DIN 8187, ISO 606	00000000	000000
For DIN, ISO 08B Roller Chain (12.7 mm Pitch)
27	16	53	115.7	30	82	Steel	DIN 8187, ISO 606	00000000	00000

Flat Sprockets for Metric Roller Chain

With metric teeth and slim profile, these sprockets allow your ISO roller chain to reach narrow spaces. They're commonly referred to as A-plate sprockets. Machine the unfinished bore to fit your shaft—sprockets come machined to the shaft diameter listed and are machinable up to the maximum shaft diameter size. Sprockets meet DIN 8187 and ISO 606, international standards for sprockets and roller chains.

For technical drawings and 3-D models, click on a part number.

For ISO 08B Roller Chain (12.7 mm Pitch)
Number of Teeth	For Shaft Dia., mm	For Max. Shaft Dia., mm	OD, mm	Overall Wd., mm	Material	Specifications Met		Each
27	16	96	116.33	8	Steel	DIN 8187, ISO 606	00000000	000000

Sprockets for Double-Strand Metric Roller Chain

The double row of teeth on these sprockets are designed to fit into metric ISO double-strand roller chain. They have an unfinished bore that’s machined to the shaft diameter size listed. Machine them to fit any shaft up to the maximum shaft diameter size. The extended hub makes these sprockets more stable and more durable than flat sprockets. They meet ISO 606 (formerly DIN 8187), which is an international standard for sprocket and roller chain dimensions and materials.

For technical drawings and 3-D models, click on a part number.

For ISO 06B-2 Roller Chain (9.53 mm Pitch)
Number of Teeth	For Shaft Dia., mm	For Max. Shaft Dia., mm	OD, mm	Overall Wd., mm	Hub Dia., mm	Material	Specifications Met		Each
27	12	45	87.6	30	70	Steel	DIN 8187, ISO 606	00000000	000000

High-Strength HTD Timing Belt Idler Pulleys

Keep high torque drive (HTD) timing belt systems running tightly with these idler pulleys. Made with built-in, free-spinning ball bearings, they're installed on shafts or belt tensioners (not included) to remove slack from timing belts. By maintaining tension on the belt, these pulleys reduce wear and vibration in 3D printing, machine tool drives, robotics, and other linear motion applications that require precise positioning.

When replacing an idler pulley, be sure the pulley matches your belt's trade size.

Toothed pulleys are shaped to mesh with the teeth on a timing belt, which reduces wear on the belt's teeth.

Iron pulleys are strong and wear resistant, with a black oxide coating that protects them from corrosion in dry environments.

For technical drawings and 3-D models, click on a part number.

Toothed

For 40 mm Max. Belt Wd.
OD	Number of Teeth	For Shaft Dia.	Dia.	Wd.	Shaft Mount Type	Bore Type	Fabrication	Material	Bearing Type		Each
4.63"	27	1"	4.63"	1 5/8"	Press Fit	Plain	Machined	Black-Oxide Iron	Needle Roller	0000000	000000
For 55 mm Max. Belt Wd.
4.63"	27	1"	4.63"	2 5/16"	Press Fit	Plain	Machined	Black-Oxide Iron	Needle Roller	0000000	000000
For 85 mm Max. Belt Wd.
4.63"	27	1"	4.63"	3 1/2"	Press Fit	Plain	Machined	Black-Oxide Iron	Needle Roller	0000000	000000

About Roller Chain and Sprockets

Sprockets for ANSI Roller Chain

Sprockets for Metric Roller Chain

Flat Sprockets for Metric Roller Chain

Sprockets for Double-Strand Metric Roller Chain

High-Strength HTD Timing Belt Idler Pulleys