18mm Axles | McMaster-Carr

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System of Measurement

Keyway Width

Length

End Type

Keyway Depth

Material

For Motion

Keyway Length

Shaft Type

Edge Type

Export Control Classification Number (ECCN)

EAR99

Key Coverage

Full

Steel Grade

1045 Carbon Steel

Straightness Tolerance Rating

Standard

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

DFARS Specialty Metals

REACH

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Mechanical Finish

Tolerance Rating

Hardness

Hardness Rating

4 Products

Keyed Rotary Shafts

Match with a machine key to prevent slipping while transmitting torque to gears and other components. Turned, ground, and polished to tight tolerances, these shafts reduce vibration, evenly distribute loads, and improve accuracy.

Fully Keyed

Mount components anywhere along the length of these shafts. For secure torque transmission, slide a component from either end and lock it into place with an ANSI machine key (sold separately).

Carbon Steel—Strong and easy to machine. These shafts work best in dry environments since moisture will cause steel to rust.

		Keyway						Material
	Lg., mm	Lg.	Wd.	Dp.	ANSI Keys Included	Straightness Tolerance	Dia. Tolerance, mm	Hardness	Hardness Rating		Each
Carbon Steel







				18 mm Diameter

				200	200 mm	6 mm	3.5 mm	No	0.33 mm/300 mm	-0.0635 to 0	Rockwell B95	Medium	1439K36	000000


				400	400 mm	6 mm	3.5 mm	No	0.33 mm/300 mm	-0.0635 to 0	Rockwell B95	Medium	1439K37	00000
				1,000	1,000 mm	6 mm	3.5 mm	No	0.33 mm/300 mm	-0.0635 to 0	Rockwell B95	Medium	1439K38	00000
				2,000	2,000 mm	6 mm	3.5 mm	No	0.33 mm/300 mm	-0.0635 to 0	Rockwell B95	Medium	1439K39	000000