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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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Brand

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)

0.590 in (15.0 mm) (28)

0.750 in (19.1 mm) (72)

1.000 in (25.4 mm) (248)

1.313 in (33.3 mm) (362)

1.625 in (41.3 mm) (480)

2.000 in (50.8 mm) (307)

2.250 in (57.2 mm) (420)

2.750 in (69.9 mm) (272)

3.125 in (79.4 mm) (272)

Material

Aluminum (2461)

Bore (B1)

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0.3750 in (48)

0.5000 in (102)

0.6250 in (104)

0.7500 in (98)

0.8750 in (60)

1.0000 in (82)

1.1250 in (60)

1.2500 in (72)

1.3750 in (42)

1.5000 in (54)

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1.7500 in (30)

3 mm (1)

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30 mm (44)

32 mm (32)

35 mm (22)

38 mm (18)

40 mm (10)

42 mm (6)

45 mm (2)

Keyway

No (1290)

Yes (1171)

B1 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)

0.804 in (19)

0.804 in (20.4 mm) (72)

0.935 in (19)

0.935 in (23.7 mm) (72)

0.946 in (40)

0.946 in (24.0 mm) (176)

1.099 in (30)

1.099 in (27.9 mm) (120)

1.496 in (56)

1.496 in (38.0 mm) (182)

1.582 in (56)

1.582 in (40.2 mm) (126)

1.750 in (56)

1.750 in (44.5 mm) (126)

13.1 mm (10)

14.5 mm (30)

15.9 mm (55)

18.2 mm (55)

20.4 mm (90)

23.7 mm (90)

24.0 mm (264)

27.9 mm (157)

38.0 mm (182)

40.2 mm (90)

44.5 mm (90)

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)

0.804 in (19)

0.804 in (20.4 mm) (72)

0.935 in (19)

0.935 in (23.7 mm) (72)

0.946 in (40)

0.946 in (24.0 mm) (176)

1.099 in (30)

1.099 in (27.9 mm) (120)

1.496 in (56)

1.496 in (38.0 mm) (182)

1.582 in (56)

1.582 in (40.2 mm) (126)

1.750 in (56)

1.750 in (44.5 mm) (126)

13.1 mm (10)

14.5 mm (30)

15.9 mm (55)

18.2 mm (55)

20.4 mm (90)

23.7 mm (90)

24.0 mm (264)

27.9 mm (157)

38.0 mm (182)

40.2 mm (90)

44.5 mm (90)

Bore Tolerance

+0.001 in / -0.000 in (272)

Bellows Coupling - Extended Length (305)

Bellows Coupling Standard Length (2156)

Keyway (K1)

1/4 in (107)

1/8 in (51)

2 mm (18)

3 mm (48)

3/16 in (131)

3/32 in (24)

3/8 in (55)

4 mm (79)

5 mm (213)

5/16 in (21)

6 mm (165)

8 mm (130)

10 mm (87)

12 mm (26)

14 mm (16)

Keyway (K2)

NK (68)

1/4 in (76)

1/8 in (72)

2 mm (54)

3 mm (88)

3/16 in (112)

3/32 in (60)

3/8 in (13)

4 mm (107)

5 mm (233)

5/16 in (13)

6 mm (121)

8 mm (109)

10 mm (36)

12 mm (8)

14 mm (1)

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Bore (d): low to high

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Bore (B1): high to low
Bore (B2): low to high
Bore (B2): high to low
O.D. (D): low to high
O.D. (D): high to low
Length (L): low to high
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Bore (B1)

Bore (B2)

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Length (L)

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10 mm

1.000 in (25.4 mm)

1.523 in (38.7 mm)

MBCL25-10-10-A

Ruland Brand / 10mm X 10mm Bellows Coupling Bores / 25.4mm Od,, 38.7mm Length / Bellows Coupling / Clamp Style / Aluminum

PDF

$137.05 / each

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10 mm

1.313 in (33.3 mm)

1.962 in (49.8 mm)

MBCL33-10-10-A

Ruland Brand / 10mm X 10mm Bellows Coupling Bores / 33.3mm Od,, 49.8mm Length / Bellows Coupling / Clamp Style / Aluminum

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$147.99 / 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

BCL21-10MM-5/16"-A

$147.99 / each

BCLK16-10MM-3/8"-A

$162.70 / each

BCLK16-10MM-5/16"-A

$162.70 / each

BCLK16-10MM-1/4"-A

$162.70 / each

BCLK21-10MM-3/8"-A

$176.55 / each

BCLK21-10MM-5/16"-A

$176.55 / each

MBCL25-10-6-A

$137.05 / each

MBCL25-10-7-A

$137.05 / each

MBCL25-10-8-A

$137.05 / each

MBCL25-10-9-A

$137.05 / each

MBCL25-10-10-A

$137.05 / each

MBCL33-10-10-A

$147.99 / each

Product Added to Cart and Back Orders

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