Integrated Freewheels Fxrt Backstop with Sprag Lift-off X

• Customization: Available
• Type: Motorcycle Transmissions
• Certification: ISO9001: 2000
• Model NO.: FXRT 120 - 50
• Material: Gcr15
• Model: Fxrt 120 - 50
• Inner Diameter: 60-95mm
• Outer Diameter: 360mm
• Weight: 87kg
• Width: 70mm
• Sprag Lift-off at Inner Ring Speed: 320r/Min
• Precision: P6
• OEM: Accept
• Port: Shanghai;Ningbo
• Delivery: 10-15days
• Transport Package: Single Box or as Your Requirements
• Specification: P6
• Trademark: SUMA or OEM
• Origin: Changzhou, Jiangsu, China
• HS Code: 84836000
• Production Capacity: 10000PCS/Month

Product Description

Integrated Freewheels FXRV and FXRT
for bolting to the face
with sprag lift-off X and torque limiting
 
Features
Integrated Freewheels FXRV and FXRT are sprag freewheels without bearing support and with sprag lift-off X. They consist of the Integrated Freewheels FXM with additional torque limiter. The sprag lift-off X ensures a wear-free freewheeling operation when the inner ring rotates at high speed. The freewheels FXRV and FXRT are used as:
 Backstops
for continuous conveyor installations with multiple drives in which each drive is equipped with
its own backstop. In such continuous conveyor installations with multiple drives it is important
to consider the problem of the unequal distribution of backdriving torque to the individual
drives and backstops. As soon as the installation comes to a standstill, the entire backdriving torque is applied primarily to a single backstop, due to differences in the play and elasticity of
the drives involved. In installations equipped with backstops without torque limiters, the individual gearboxes and the corresponding backstops must be designed to accommodate
the entire backdriving torque of the conveyor installation in order to ensure safety.
 
The problem of the unequal distribution of backdriving torque is solved by using backstops
FXRV and FXRT with torque limiting. The torque limiter which is built into the backstop slips
temporarily when the specified torque is exceeded until the other backstops engage in succession. In this way, the entire backdriving torque of the conveyor installation is distributed
to the individual gearboxes and backstops. Furthermore, dynamic peak torques which occur during the locking process are reduced, thereby protecting the gearboxes against damaging
peak torques. For this reason the use of backstops FXRV and FXRT with torque limiting
in continuous conveyor installations with multiple drives enables the application of gearboxes
with smaller dimensions.
 
Advantages
1. Protection of gearboxes from overload by unequal load distribution in multiple drives
2.Protection of gearboxes from dynamic peak torques during the locking process
3. Smaller gearboxes can be used without negatively effecting the safety
4.Protection of the backstops, as dynamic peak torques are reduced by temporarly slipping

Freewheel Size	Type	Slipping torque MR Nm	Sprag lift-off at inner ring speed min-1	Max. speed Inner ring  freewheels min-1	mm	mm	Bore d Standard mm       mm		mm	mm	max. mm	A mm	B mm	C mm	D mm	G**	H mm	K mm	L mm	O mm	R mm	S mm	T mm	min. mm	U*** max. mm	V mm	Z**	kg
FXRT  85 - 40	MX	1 400	430	6 000	45	50	60	65			65	330	148	6	295	M 12	37	29	60	127	280	110	308	165	215	43	6	60
FXRT 100 - 50	MX	2 300	400	4 500	45	50	55	60	70	75	80*	350	159	6	311	M 12	39	31	70	134	300	125	328	180	240	38	6	66
FXRT 120 - 50	MX	3 400	320	4 000	60	65	70	75	80	95	95	400	159	6	360	M 16	36	31	70	134	340	145	373	200	260	38	6	87
FXRT 140 - 50	MX	4 500	320	3 000	65	90	100	110			110	430	163	6	386	M 16	36	31	70	134	375	165	403	220	280	50	6	104
FXRT 170 - 63	MX	9 000	250	2 700	70	85	90	100	120		130	500	188	6	460	M 16	43	40	80	156	425	196	473	250	340	38	6	166
FXRT 200 - 63	MX	12 500	240	2 100	130						155	555	188	6	516	M 16	49	40	80	156	495	226	528	275	390	38	6	209
FXRT 240 - 63	LX	21 200	220	3 000							185	710	210	8	630	M 20	50	50	90	170	630	290	670	355	455	45	12	355
FXRT 260 - 63	LX	30 000	210	2 500							205	750	223	8	670	M 20	50	50	105	183	670	310	710	375	500	40	12	418
FXRT 290 - 70	LX	42 500	200	2 500							230	850	243	8	755	M 24	52	50	105	190	730	335	800	405	560	48	12	574
FXRT 310 - 96	LX	53 000	195	2 100							240	900	293	10	800	M 24	63	63	120	240	775	355	850	435	600	69	12	805

Torques
The Integrated Freewheels FXRT are supplied with a set slipping torque MR of the torque
limiter. The static backdriving torque ML of the installation (also in the case of an overload)
must under no circumstances achieve the sum of the slipping torques MR of the provided
Integrated Freewheels. The slipping torques MR specified in the table are maximum values;
lower values can be set.
 
Mounting
The Integrated Freewheels FXRT are without bearing support, therefore it must be ensured
that the run out (T.I.R.) between the pilot diameter R and the shaft diameter d does not
exceed the value 0,25 mm. Dimension C applies for the Integrated Freewheel. The centering depth of the customer attachment part must be at least C + 0,2 mm. The tolerance of the pilot diameter R of the attachment part must be ISO H7. The tolerance of the shaft must be ISO h6 or j6.
Release function
The finely controllable release function consists basically of three special screws (2) that are located in the spring pocket (1) and the safety tabs (3). To release the backstop, first of all the
special screws have to be unscrewed slightly. Then the cylinder screws (4) and the safety tabs
have to be removed. The special screws can then be tightened, whereupon, with the aid of
the belleville spring set (5) the release procedure is finely initiated.