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Add: Liudao Industrial Park, YaoguanTown, Wujin District , Changzhou City , Jiangsu Province, China , 213102

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BREU Basic series and BREU-K series High Torque Cam Clutch

The BREU series is a modular cam clutch (overrunning clutch / one-way clutch) designed for applications requiring high torque transmission and reliable backstopping or indexing. Delivered as a Basic type or BREU-K type (with outer race keyway), with optional flanges and torque arm available as separate parts.

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Product Detail

Why Choose Suma BREU Series Cam Clutch ?

High torque capacity: From 607 N·m (BREU 30) to 33,908 N·m (BREU 150).
Modular design: Choose basic clutch or add keyway (K), flanges (E1/E2/E5/E7), torque arm (E3), or cover (E4) as needed.
Pre-greased & ready: Operational from -40°C to +40°C. No field lubrication required under normal conditions.
Industry-standard mounting: Shaft tolerance h7, keyway to DIN6885.1, and flange fit H7/H8.
Reversible rotation: Install optional parts on the opposite side to change overrunning direction.

BREU SERIES CAM CLUTCH

Capacities

Model	Torque Capacity	Inner Race Overrunning Speed		Max.Engagement
Model	N·m	Min. (r/min)	Max. (r/min)	Speed(r/min)
BREU 30 (K)	607	880	3600	350
BREU 35 (K)	686	780	3600	300
BREU 40 (K)	980	720	3600	300
BREU 45 (K)	1078	670	3600	280
BREU 50 (K)	1715	610	3600	240
BREU 55 (K)	1960	580	3600	220
BREU 60 (K)	3479	490	3600	200
BREU 70 (K)	4735	480	3600	200
BREU 80 (K)	6517	450	3600	190
BREU 90 (K)	8526	420	3000	180
BREU100 (K)	14210	460	2500	180
BREU130 (K)	20384	420	2200	180
BREU150 (K)	33908	370	1300	180

General Information for Installation and Usage

11. BREU series is a modular type Cam Clutch which is delivered as a BREU series Basic type or BREU-K series

with option parts (E1, E2, E5, E7 flanges, E3 Torque arm and E4 cover) which are required as separate parts.

12. All models are pre-greased.

The operational temperature range is –40°C to +40°C.

Too much additional grease to both bearing inhibits the basic Cam Clutch function. Refer to page 63 for the

maintenance.

13. We recommend a Shaft tolerance of h7, and DIN6885.1 keyway is standard.

14. We recommend tolerance of B and E H7 or H8 for sprockets, gears and other fitted parts.

15. Clean the surface of both end of the outer race and the contact surfaces of the flanges, torque arm and

cover.

16. Verify the direction of rotation and attach the flanges, torque arm or cover.

17. When installing sprocket, gear, and other equipment to the clutch, fit them on the surface of the flange by

using hexagon socket cap screws.

18. By installing each option part on the opposite side, the direction of rotation can be changed.

19. Fix the grease nipple and set screw to the option parts.

10. When mounting the clutch onto the shaft, apply pressure to the inner race but never to the outer race. Tap the

inner race lightly with a soft hammer moving around the race circumference so the Cam Clutch moves slowly

and uniformly onto the end of the shaft.

11. Do not use grease that contains EP additives.

12. Model No.

Capacities

BREU K

No Mark : No keyway on the outer race.

K : Keyway on the outer race.

Dimensions

Model	Bore Size	Keyway	A	B	C	D	E	F	G	H-J	K	L	b	t1	Weight
Model	H7	Inner Race		h7		PCD						C	P10		kg
BREU 30 (K)	30	8x3.3	76	100	51	87	75	45	56	6-M6	10	1.0	8	4.0	2.7
BREU 35 (K)	35	10x3.3	79	110	50	96	80	50	56	6-M6	12	1.0	10	5.0	3.2
BREU 40 (K)	40	12x3.3	86	125	53	108	90	55	59	6-M8	14	1.3	12	5.0	4.4
BREU 45 (K)	45	14x3.8	86	130	53	112	95	60	59	8-M8	14	1.3	14	5.5	4.7
BREU 50 (K)	50	14x3.8	94	150	64	132	110	70	72	8-M8	14	1.3	14	5.5	7.6
BREU 55 (K)	55	16x4.3	104	160	66	138	115	75	72	8-M10	16	1.5	16	6.0	8.9
BREU 60 (K)	60	18x4.4	120	170	84	150	125	80	95	10-M10	16	1.5	18	7.0	12.5
BREU 70 (K)	70	20x4.9	134	190	95	165	140	90	108	10-M10	16	1.8	20	7.5	17.2
BREU 80 (K)	80	22x5.4	144	210	100	185	160	105	108	10-M10	16	1.8	22	9.0	22.4
BREU 90 (K)	90	25x5.4	158	230	115	206	180	120	125	10-M12	20	2.0	25	9.0	30.3
BREU100(K)	100	28x6.4	186	270	124	240	210	140	135	10-M16	24	2.0	28	10.0	45.5
BREU130(K)	130	32x7.4	212	310	152	278	240	160	168	12-M16	24	2.5	32	11.0	67.0
BREU150(K)	150	36x8.4	246	400	180	360	310	200	194	12-M20	32	2.5	36	12.0	145.0

Installation and Usage
1. By installing both parts on the opposite side, the direction of
rotation can be changed.
2. When mounting the clutch onto the shaft, apply pressure to the
inner race but never to the outer race. Tap the inner race
lightly with a soft hammer moving around the race
circumference so the Cam Clutch moves slowly and uniformly
onto the end of the shaft.
3. All models are pre-greased.
The ambient temperature range is –40°C to +40°C.
Too much additional grease to both bearing inhibits the basic
Cam Clutch function. Refer to page 68 for the maintenance.
4. Refer to page 60 for other general information.

Typical Applications for BREU Cam Clutches

Conveyor Backstopping : Prevents reverse drop on inclined belt conveyors, bucket elevators. Recommend BREU-K with keyway for positive outer race fixation.
Gearbox Overrunning : Enables freewheeling in industrial gearboxes and speed reducers. Basic BREU with flange mounting is typical.
Indexing Tables : Precise positioning in assembly and packaging machines. Use BREU with torque arm (E3).
High-Inertia Starting Systems: Allows motor to start unloaded, then engage.

How to Choose: Basic BREU vs BREU-K Cam Clutch

BREU Basic Cam Clutch : Outer race has no keyway. Secured via flange clamping or shrink fit. Suitable for flange-mounted applications.
BREU-K Cam Clutch : Outer race includes a keyway for positive mechanical anti-rotation. Recommended for torque arm mounting or when outer race must be locked precisely.

FAQs: BREU Series Cam Clutch

Q1: What is the price of BREU 50 or BREU 80K cam clutch?

A: Suma is a factory direct supplier. Price depends on quantity, K-type vs basic, and option parts (flange, torque arm). Please contact us with your model, quantity, and required accessories for a competitive quote.

Q2: Is BREU series interchangeable with Formsprag or Marland clutches?

A: BREU series dimensions (bore, outer diameter, length) are designed to common industry standards. BREU 50, BREU 80, BREU 100 are often direct replacements. Send us your existing part number for cross-reference and verification.

Q3: Can I change the overrunning direction of a BREU Cam Clutch ?

A: Yes. By installing the optional flanges or torque arm on the opposite side of the clutch, the direction of rotation can be reversed. Refer to the installation drawing or contact our technical support.

Q4: What is the difference between BREU Basic and BREU-K Cam Clutch ?

A: BREU-K has a keyway on the outer race for positive mechanical anti-rotation. BREU Basic has no outer keyway and relies on flange clamping. Choose BREU-K when mounting with a torque arm or when outer race sees high shock loads.

Q5: Do you offer BREU Cam clutches with special bores or corrosion-resistant coating?

A: Yes. Suma provides custom bores, keyways, black oxide or zinc-phosphate coating for corrosion protection. MOQ may apply. Please inquire with your specifications.

Q6: What is the maximum overrunning speed for BREU 130?

A: BREU 130 (130 mm bore) has a maximum inner race overrunning speed of 420 r/min and engagement speed up to 180 r/min. Do not exceed these limits to avoid spring or cam damage.