Deep groove ball bearing

FSO750-FSO1027 Sprag Backstop Clutch

Product information

Backstop (Overrunning clutch)FSO750-1027

Feature

Types FS, FSO, and HPI 750 to 1027 are sprag type freewheels self-contained, sealed and bearing supported, using two ball bearings.

Units are delivered oil or grease lubricated according to the type. It is a Formsprag USA design that uses tall sprags with multi-radius active surfaces. Designed specially for large size freewheels to compensate for any eccentricity due to bearing wear. Types FS and HPI are oil lubricated and use standard shaft lip seals. Type FSO is grease lubricated and equipped with special grease seals.

Type HPI is specially designed for high speed indexing applications. Each of the different models show a range of standard metric bore diameters. We can supply any bore size between the minimum and maximum specified in the table, including imperial sizes.

Type	Size	DIMENSIONS
FSO FS HPI		dH7-bxh	d4)	A	B5)	C	D	E	F	G	z	J	K	L	P	f
			min-max		-0.05
		[mm]	[mm]	[mm]	[mm]	[mm]	[mm]	[mm]	[mm]	[mm]			[mm]	[inch]	[mm]	[mm]
		65-18x11
		70-20x12
	750	75-20x12	57–87	152.4	222.25	149.2	31.7	1.6	107.74	177.8	8*	M12	25	1/2-20	49.2	1.6
		80-22x14
		85-22x14
		80-22x14
	800	90-25x14	66–112	152.4	254	149.2	31.7	1.6	139.7	227	8	M12	25	1/2-20	49.2	1.6
		100-28x16
		110-28x16
		100-28x16
	900	110-28x16	92–138	161.9	304.8	158.7	34.9	1.6	161.92	247.65	10	M16	32	1/2-20	54	1.6
		120-32x18
		130-32x18
		130-32x18
	1027	150-36x20	125–177	168.3	381	165.1	34.9	3.2	228.6	298.45	12	M16	32	1/2-20	54	3.2
		175-45x25

Type	Size	Torque	Overrunning speeds		Lubricant			Weight	Drag Torque
FSO FS HPI		capacity	FSO	FS	FSO	HPI	FS		TR
		TKN1)	nmax2)	nmax3)
		[Nm]	[min-1]	[min-1]	[ml]	[ml]	[ml]	[kg]	[Ncm]
	750	9660	1800/650	1000/650	222	384	207	38	5.08
	800	17940	1500/525	850/525	222	444	251	46	7.12
	900	24408	1350/500	700/500	532	473	340	71	8.47
	1027	36612	700/375	500/375	651	946	473	113	13.56

NOTES

1) T max = 2 × T KN
» Refer to Selection page 10 to 13
2) Inner race/outer race
3) Inner race/outer race
4) Inch bore available on request
*) 6 holes equally spaced at 60° plus 2 extra-holes at
180°
5) Tolerance for sizes 900 and 1027: -0,08

MOUNTING EXAMPLE