Step Down Axles | McMaster-Carr

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1045 Carbon Steel

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21 Products

Step-Down Rotary Shafts

A shoulder acts as a stop for gears, sprockets, and bearings as well as components with smaller bore sizes. No need to machine these rotary shafts or install a shaft collar. Turned, ground, and polished to tight tolerances, they reduce vibration, evenly distribute loads, and improve accuracy.

Step-Down on One End

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

Corrosion-Resistant 303 Stainless Steel—Withstand moisture and mild cleaning solutions, such as acetone and ammonia. These shafts are easier to machine than other stainless steel shafts.

		Step				Material
	Lg.	Dia.	Lg.	Straightness Tolerance	Dia. Tolerance	Hardness	Hardness Rating		Each
Carbon Steel







				3/4" Diameter

				6"	1/2"	3"	0.003"/1 ft.	-0.001" to 0"	Brinell 150	Medium	8641T1	000000


				9"	1/2"	3"	0.003"/1 ft.	-0.001" to 0"	Brinell 150	Medium	8641T2	00000
				12"	1/2"	3"	0.003"/1 ft.	-0.001" to 0"	Brinell 150	Medium	8641T3	00000




						1" Diameter

						6"	3/4"	3"	0.003"/1 ft.	-0.001" to 0"	Brinell 150	Medium	8641T4	00000


						9"	3/4"	3"	0.003"/1 ft.	-0.001" to 0"	Brinell 150	Medium	8641T5	00000
						12"	3/4"	3"	0.003"/1 ft.	-0.001" to 0"	Brinell 150	Medium	8641T6	00000


						Corrosion-Resistant 303 Stainless Steel







										3/4" Diameter

										6"	1/2"	3"	0.003"/1 ft.	-0.001" to 0"	Brinell 160	Medium	8641T21	00000


										9"	1/2"	3"	0.003"/1 ft.	-0.001" to 0"	Brinell 160	Medium	8641T22	00000
										12"	1/2"	3"	0.003"/1 ft.	-0.001" to 0"	Brinell 160	Medium	8641T23	00000




												1" Diameter

												6"	3/4"	3"	0.003"/1 ft.	-0.001" to 0"	Brinell 160	Medium	8641T24	00000


												9"	3/4"	3"	0.003"/1 ft.	-0.001" to 0"	Brinell 160	Medium	8641T25	00000
												12"	3/4"	3"	0.003"/1 ft.	-0.001" to 0"	Brinell 160	Medium	8641T26	00000

Step-Down on Both Ends

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

		Step				Material
	Lg.	Dia.	Lg.	Straightness Tolerance	Dia. Tolerance	Hardness	Hardness Rating		Each
Carbon Steel







				3/4" Diameter

				12"	1/2"	3"	0.003"/1 ft.	-0.001" to 0"	Brinell 150	Medium	8641T51	000000


				18"	1/2"	3"	0.003"/1 ft.	-0.001" to 0"	Brinell 150	Medium	8641T52	00000
				24"	1/2"	3"	0.003"/1 ft.	-0.001" to 0"	Brinell 150	Medium	8641T53	00000




						1" Diameter

						12"	1/2"	3"	0.003"/1 ft.	-0.001" to 0"	Brinell 150	Medium	8641T57	00000


						12"	3/4"	3"	0.003"/1 ft.	-0.001" to 0"	Brinell 150	Medium	8641T54	00000
						18"	1/2"	3"	0.003"/1 ft.	-0.001" to 0"	Brinell 150	Medium	8641T58	00000
						18"	3/4"	3"	0.003"/1 ft.	-0.001" to 0"	Brinell 150	Medium	8641T55	00000
						24"	1/2"	3"	0.003"/1 ft.	-0.001" to 0"	Brinell 150	Medium	8641T59	00000
						24"	3/4"	3"	0.003"/1 ft.	-0.001" to 0"	Brinell 150	Medium	8641T56	00000