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Bellows Couplings

Ruland bellows couplings, available thru Pacific International Bearing Sales, are ideal for high-performance servo and stepper motor applications requiring precise motion control. These zero-backlash couplings feature a balanced design and combine high torque capacity with excellent torsional stiffness, while accommodating angular, axial, and parallel misalignment. Constructed with lightweight anodized aluminum hubs and a flexible stainless steel bellows, they support speeds up to 10,000 RPM with minimal inertia. Available in clamp-style with or without keyways, in inch, metric, and mixed bore sizes from 1/8" to 1 3/4" and 3mm to 45mm.

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Ruland (2461)

Length (L)

1.076 in (27.3 mm) (28)

1.306 in (33.2 mm) (36)

1.345 in (34.2 mm) (124)

1.355 in (34.4 mm) (36)

1.523 in (38.7 mm) (124)

1.700 in (43.2 mm) (181)

1.962 in (49.8 mm) (181)

2.035 in (51.7 mm) (240)

2.316 in (58.8 mm) (240)

2.413 in (61.3 mm) (307)

3.235 in (82.2 mm) (420)

3.431 in (87.1 mm) (136)

3.439 in (87.4 mm) (136)

3.808 in (96.7 mm) (136)

3.816 in (96.9 mm) (136)

O.D. (D)

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3.125 in (79.4 mm) (272)

Material

Aluminum (2461)

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B2 Max Shaft Penetration

0.517 in (6)

0.517 in (13.1 mm) (12)

0.570 in (12)

0.570 in (14.5 mm) (30)

0.626 in (17)

0.626 in (15.9 mm) (52)

0.715 in (17)

0.715 in (18.2 mm) (52)

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1.099 in (27.9 mm) (120)

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23.7 mm (90)

24.0 mm (264)

27.9 mm (157)

38.0 mm (182)

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44.5 mm (90)

Bore Tolerance

+0.001 in / -0.000 in (272)

Bellows Coupling - Extended Length (305)

Bellows Coupling Standard Length (2156)

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1/4 in (107)

1/8 in (51)

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3 mm (48)

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3/32 in (24)

3/8 in (55)

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6 mm (165)

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10 mm (87)

12 mm (26)

14 mm (16)

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NK (68)

1/4 in (76)

1/8 in (72)

2 mm (54)

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8 mm (109)

10 mm (36)

12 mm (8)

14 mm (1)

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Bore (B1): high to low
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Bore (B1)

Bore (B2)

O.D. (D)

Length (L)

Product

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0.5000 in

9 mm

1.000 in (25.4 mm)

1.523 in (38.7 mm)

BCLK16-1/2"-9MM-A

Ruland Brand / 1/2" X 9mm Bellows Coupling With Keyways Bores / 1.000" (25.4mm) Od,, 1.523" (38.7mm) Length / Bellows Coupling With Keyways / Increased Misalignment / Aluminum

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$162.70 / each

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READY TO SHIP

0.5000 in

9 mm

1.313 in (33.3 mm)

1.962 in (49.8 mm)

BCLK21-1/2"-9MM-A

Ruland Brand / 1/2" X 9mm Bellows Coupling With Keyways Bores / 1.313" (33.3mm) Od,, 1.962" (49.8mm) Length / Bellows Coupling With Keyways / Increased Misalignment / Aluminum

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$176.55 / each

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Filters

Brand

Length (L)

O.D. (D)

Material

Bore (B1)

Bore (B2)

Keyway

B1 Max Shaft Penetration

B2 Max Shaft Penetration

Bore Tolerance

Screw Material

Screw Finish

ISO 9001:2015

REACH

RoHS3

Conflict Minerals

Tariff Code

Product Group

Keyway (K1)

Keyway (K2)

Bore (B1)

Bore (B2)

O.D. (D)

Length (L)

Product

Files

Price

BCLK16-1/2"-9MM-A

$162.70 / each

BCL21-8-8-A

$147.99 / each

BCLK16-1/2"-11MM-A

$162.70 / each

BCLK16-8-4-A

$162.70 / each

BCLK16-8-5-A

$162.70 / each

BCLK16-8-6-A

$162.70 / each

BCLK16-8-8-A

$162.70 / each

BCLK21-1/2"-11MM-A

$176.55 / each

BCLK21-1/2"-12MM-A

$176.55 / each

BCLK21-1/2"-8MM-A

$176.55 / each

BCLK21-1/2"-10MM-A

$176.55 / each

BCLK21-1/2"-9MM-A

$176.55 / each

Product Added to Cart and Back Orders

Product Added to Back Orders

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