8mm Wide Rollers | McMaster-Carr

Also known as eccentric track rollers, the shoulder adjusts up or down to align to your track, enabling uniform alignment among rollers in a system. Rollers are for use with Angle Rails for V-Groove Track Rollers. They handle radial and thrust (top and side) loads and work well in dirty environments because debris falls off the angled rail. Secure the stud with a nut for through-hole mounting. All rollers are permanently lubricated.

External Hex Shoulder Drive

440C Stainless Steel Rollers—440C stainless steel rollers offer better corrosion resistance than steel rollers.

With Seal—Rollers with a seal block out dust and other contaminants better than shielded rollers, but they hold more heat. Their seal also helps retain lubricant.

Plastic Overmold—Rollers with a plastic overmold make less noise than other rollers, and they’re suitable for corrosive environments. However, they have lower weight capacities than other similarly sized rollers and they’re less corrosion resistant than other stainless steel rollers.

	Roller, mm		Stud, mm		Thread				Groove, mm			Load Capacity, lb.
	Dia.	Wd.	Dia.	Lg.	Size	Lg., mm	Shoulder Lg., mm	Hex Shoulder Wd., mm	Wd.	Dp.	Max. Rotation Speed, rpm	Static Radial	Dynamic Radial	Static Thrust	Max. Temp., ° F	Features	Includes		Each
Steel V-Groove Rollers With Seal



		20	8	6	8	M6 × 1 mm	6	3.4	11.11	4	2	5,000	270	270	50	245	—	Mounting Hardware	3672K21	000000


		440C Stainless Steel V-Groove Rollers With Seal



				20	8	6	15	M6 × 1 mm	9	2.1	12	4	2	5,300	220	220	40	500	—	Mounting Hardware	3672K44	000000


				440C Stainless Steel V-Groove Rollers Without Seal



						20	8	6	8	M6 × 1 mm	6	3.3	11.11	4	2	5,300	270	270	50	245	Shielded	—	3672K39	00000


						20	8	6	8	M6 × 1 mm	6	3.3	12	4	2	975	12	12	6	245	Plastic Overmold, Shielded	—	3672K38	00000
						20	8	6	15	M6 × 1 mm	9	2.1	12	4	2	3,400	270	270	50	245	Shielded	Mounting Hardware	3672K42	00000

Threaded Track Rollers

Also known as cam followers, track rollers support loads while guiding and positioning work. Thread the stud directly into a component or secure with a nut for through-hole mounting.

With Seal—Rollers with seal have end seals to protect rolling elements from dirt and contamination.

	Roller, mm		Stud, mm		Thread		Shoulder, mm			Load Capacity, lb.
	Dia.	Wd.	Dia.	Lg.	Size	Lg., mm	Dia.	Lg.	Max. Rotation Speed, rpm	Static Radial	Dynamic Radial	Max. Temp., ° F	Bearing Type	Includes		Each
Steel Flat Rollers Without Seal







				Hex Roller-Head Drive

				12	8	4	11	M4 × 0.7 mm	6	9	0.5	10,000	860	850	245	Needle	Mounting Hardware	6314K12	000000


				Steel Flat Rollers With Seal







								Hex Roller-Head Drive

								12	8	4	11	M4 × 0.7 mm	6	9	0.5	10,000	860	850	175	Needle	Mounting Hardware	6314K15	00000

Threaded V-Groove Track Rollers

Thread the stud directly into a component or secure with a nut for through-hole mounting. Rollers are for use with Angle Rails for V-Groove Track Rollers. They handle radial and thrust (top and side) loads and work well in dirty environments because debris falls off the angled rail. Also known as cam followers, track rollers support loads while guiding and positioning work. All rollers are permanently lubricated.

External Hex Shoulder Drive


External Hex Shoulder Drive

440C Stainless Steel Rollers—440C stainless steel rollers offer better corrosion resistance than steel rollers.

With Seal—Rollers with a seal block out dust and other contaminants better than shielded rollers, but they hold more heat. Their seal also helps retain lubricant.

	Roller, mm		Stud, mm		Thread				Groove, mm			Load Capacity, lb.
	Dia.	Wd.	Dia.	Lg.	Size	Lg., mm	Shoulder Lg., mm	Hex Shoulder Wd., mm	Wd.	Dp.	Max. Rotation Speed, rpm	Static Radial	Dynamic Radial	Static Thrust	Max. Temp., ° F	Bearing Type	Features	Includes		Each
Steel V-Groove Rollers With Seal



		20	8	6	15	M6 × 1 mm	9	2.1	12	4	2	5,300	270	270	50	210	Ball Bearing	—	Mounting Hardware	3672K12	000000


		20	8	8	8	M8 × 1.25 mm	8	3.3	11.11	4	2	5,000	270	270	50	245	Ball Bearing	—	—	3672K17	00000


		Steel V-Groove Rollers Without Seal



				20	8	6	15	M6 × 1 mm	9	2.1	12	4	2	5,300	270	270	50	245	Ball Bearing	Shielded	Mounting Hardware	3672K28	00000


				20	8	8	8	M8 × 1.25 mm	8	3.3	11.11	4	2	5,300	120	120	20	245	Ball Bearing	Shielded	—	3672K27	00000


				440C Stainless Steel V-Groove Rollers With Seal



						20	8	6	15	M6 × 1 mm	9	2.1	12	4	2	5,000	220	220	45	500	Ball Bearing	—	Mounting Hardware	3681K22	000000