Bellow couplings / hub clamping / bellows: stainless steel / body: aluminium, steel / BKL / R+W ANTRIEBSELEMENTE

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Design
· Two clamping hubs concentrically mounted to flexible bellows
· Brief overloads of up to 1.5x the rated torque are acceptable

Material
· Bellows: high grade stainless steel
· Hubs:
up to series 80 – aluminum, optionally steel
from series 150 – steel

Temperatur range
· -30 °C to +100 °C (-22 °F to +212 °F)

Features
· Easy to mount
· Light weight and low moment of inertia

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Product specification
Part Numbers
Catalog

BKL with Clamping Hub 2 - 500 Nm

Product Properties

Features

• easy to mount
• light weight and low moment of inertia

Material

• Bellows: high grade stainless steel
• Hubs: see table

Design

Two clamping hubs concentrically mounted to flexible bellows.
Brief overloads of up to 1.5x the rated torque are acceptable.

Optional

self-opening clamp system to open the bore during installation and removal by backing out the clamping screw.

Drawing

Specification

SIZE			2	4.5	10	15	30	60	80	150		300		500
Rated torque	(Nm)	T_KN	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
Outside diameter	(mm)	B	25	32	40	49	56	66	82	82		110		123
Fit length	(mm)	C	10	13	13	21.5	26	28	32.5	32.5		41		42.5
Inside diameter possible from Ø to Ø H7	(mm)	D_1/2	4-12.7	6-16	6-24	8-28	10-32	14-35	16-42	19-42		24-60		35-62
Fastening screw ISO 4762		E	M3	M4	M4	M5	M6	M8	M10	M10		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
Moment of inertia	(10^-3kgm²)	J_ges.	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
Hub material			AL optional steel	AL optional steel	AL optional steel	AL optional steel	AL optional steel	AL optional steel	AL optional steel	steel optional AL		steel optional AL		steel optional AL
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)	C_T	1.5	7	9	23	31	72	80	141		157		290
Axial	± (mm)	Max. values	0.5	1	1	1	1	1.5	2	2		2		2.5
Lateral	± (mm)		0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2		0.2		0.2
Angular	± (degree)		1	1	1	1	1	1	1	1		1		1
Axial spring stiffness	(N/mm)	C_a	8	35	30	30	50	67	44	77		112		72
Lateral spring stiffness	(N/mm)	C_r	50	350	320	315	366	679	590	960		2940		1450

Ordering Example

Ordering Example	BKL	80	26	22.23	XX
Model	•				Special designation only (e.g. anodized hubs).
Size		•
Bore D1 H7			•
Bore D2 H7				•

For custom features place an XX at the end of the part number and describe the special requirements (e.g. BKL / 80 / 26 / 22.23 / XX; XX=finely balanced for 25,000 rpm)

Data to be displayed: 30; 45; 60

Part Number
BKL/30/[10-32/1]/[10-32/1]
BKL/60/[14-35/1]/[14-35/1]

Part Number	Minimum order quantity	Volume Discount	Standard Shipping Days ?	Allowable Torque Range (N•m)	Shaft Bore Dia. (machined) D1 (mm)	Shaft Bore Dia. (machined) D2 (mm)	Outer Dia. A (mm)	Overall Length W (mm)	Body Material	Allowable Torque (Nm)	Allowable Axial Clearance (±) (mm)	Moment of Inertia (kg･m²)
	1		23 Days	20.01 to 50.00	10 ～ 32	10 ～ 32	56	68	Aluminum	15	1	0.00012
	1		23 Days	50.01 to 100.00	14 ～ 35	14 ～ 35	66	79	Aluminum	40	1.5	0.0003

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Basic information

Type	Bellows Type	Allowable Lateral Misalignment(mm)	0.2	Allowable Angular Misalignment(deg)	1
Bellows Part Material	Stainless Steel

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Basic Attributes

Allowable Torque Range(N•m)
20.01 to 50.00

50.01 to 100.00

100 to Less Than 500
Clear
Shaft Bore Dia. (machined) D1(mm)
[10-35/1mm Unit(s)]
Clear
Shaft Bore Dia. (machined) D2(mm)
[10-35/1mm Unit(s)]
Clear
Outer Dia. A(mm)
56

66

82
Clear
Overall Length W(mm)
68

79

92
Clear
Allowable Torque(Nm)
15

40

85
Clear
Type
- BKL
Clear
Body Material
Steel

Aluminum
Clear