BKL

Bellows couplings

The BKL bellows coupling type from R+W Couplings is the “economy” variant of the BK2 and is easy to assemble due to clamping hubs. In addition, the BKL coupling possesses a low mass moment of inertia and this precision coupling is absolutely free of backlash due to the use of friction clamp connection. Thanks to its forced bellows shape, the element can simultaneously accommodate lateral, axial and angular misalignments. As long as they do not fall outside the maximum area, no metal fatigue will occur in the bellows material and the clutch is completely free of wear. For specific questions about bellows couplings, contact VARIODRIVE.

Implementation

Klemnaaf

Nom. Torque

15-10.000 Nm

Speed

up to 10,000 rpm

Temperature range

-30 to +100 oC

Bellows material

STAINLESS STEEL

Steel or Alu

Up to 1.5x nom. Torque

Backlash

None

Service-life

No service

Optional

ATEX, clean room version

Datasheets

Bestelcode instructies
ATEX instructies
Datasheet BKL

Manuals

Manual BK/MK koppelingen

Tabel

BKL		2	4,5	10	15	30	60	80	150	300	500
Rated torque (Nm)	TKN	2	4,5	10	15	30	60	80	150	300	500
Overall length (mm)	A \| 2	30	40	44	58	68	79	92	92	109	114
Fit length (mm)	c	10,5	13	13	21,5	26	28	32,5	32,5	41	42,5
Inside diameter possible from Ø to Ø H7 (mm)	DI/D2	4-12,7	6-16	6-24	8-28	10-32	14-35	16-42	19-42	24-60	35-62
Outside diameter (mm)	B	25	32	40	49	56	66	82	82	110	123
Moment of inertia \| (10 -3 kgm2)	Jges	0,002	0,007	0,016	0,065	0,12	0,3	0,75	1,8 \| 0,8	7,5 \| 3,1	11,7 \| 4,9
Approximate weight (kg)		0,02	0,05	0,06	0,16	0,25	0,4	0,7	1,7 \| 0,75	3,8 \| 1,6	4,9 \| 2,1
Torsional stiffness (103 Nm/rad)	CT	1,5	7	9	23	31	72	80	141	157	290
Axial ± (mm))	max.	0,5	1	1	1	1	1,5	2	2	2	2,5
Lateral ± (mm)	max.	0,2	0,2	0,2	0,2	0,2	0,2	0,2	0,2	0,2	0,2
Angular ± (degree)	max.	1	1	1	1	1	1	1	1	1	1
Axial spring stiffness (N/mm)	ca	8	35	30	30	50	67	44	77	112	72
Lateral spring stiffness (N/mm)	cr	50	350	320	315	366	679	590	960	2940	1450
Fastening screw (ISO 4762)	E	M3	M4	M4	M5	M6	M8	M10	M0	M12	M16
Tightening torque of the fastening screw (Nm)	E	2,3	4	4,5	8	15	40	70	85	120	200
Distance between centerlines (mm)	F	8	11	14	17	20	23	27	27	39	41
Distance (mm)	G	4	5	5	6,5	7,5	9,5	11	11	13	17
Hub material		Aluminium optional Steel	Aluminium optional Steel	Aluminium optional Steel	Aluminium optional Steel	Aluminium optional Steel	Aluminium optional Steel	Aluminium optional Steel	Steel optional Aluminium	Steel optional Aluminium	Steel optional Aluminium
		2	4,5	10	15	30	60	80	150	300	500

Downloads

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Datasheets
Manuals

Datasheets
Datasheets
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Manuals

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Frequently Asked Questions

How can I place an order with VARIODRIVE?

You can place an order with VARIODRIVE by sending your request to orders@variodrive.nl. Your request will then be processed directly by our internal sales team.

Why should I choose a complete solution from VARIODRIVE?

By choosing VARIODRIVE’s complete solution, you won’t need to worry about integrating different drive components into the machine’s drive chain. We stand behind our complete solution and can guarantee its functionality.

Why should I choose VARIODRIVE's system warranty?

Due to our in-depth knowledge of our products and their integration into applications, we can provide a system warranty. At that point, we guarantee that the application will function using our motion control and traction solutions.

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BKL

Specifications