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Servo Couplings

Pacific International Bearing Sales offers a comprehensive selection of Ruland servo couplings engineered for precision motion control applications. Available in rigid, beam, bellows, curved jaw, disc, and Oldham styles, these zero-backlash couplings are designed to address key performance factors such as shaft misalignment, torque, speed, and space constraints. With a wide range of sizes and materials, users can find the ideal coupling to meet their specific application needs. All Ruland servo couplings are proudly manufactured in Marlborough, MA for consistent quality and reliability.

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Brand

Ruland (9000)

Note

Stainless steel hubs are available upon request. (3362)

Length (L)

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1.181 in (30.0 mm) (112)

1.189 in (30.2 mm) (52)

1.250 in (31.8 mm) (112)

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1.313 in (33.3 mm) (181)

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1.374 in (34.9 mm) (143)

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0.984 in (24)

0.984 in (25.0 mm) (202)

1.000 in (25.4 mm) (877)

1.125 in (28.6 mm) (264)

1.181 in (30.0 mm) (112)

1.250 in (31.8 mm) (528)

1.313 in (33.3 mm) (755)

1.500 in (38.1 mm) (478)

1.625 in (41.3 mm) (991)

2.000 in (50.8 mm) (947)

2.250 in (57.2 mm) (1269)

2.750 in (69.9 mm) (544)

3.125 in (79.4 mm) (544)

6 mm (12)

8 mm (12)

13 mm (40)

16 mm (72)

20 mm (98)

25 mm (128)

Material

Aluminum (7751)

303 Stainless Steel (1249)

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0.0938 in (8)

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0.1250 in (113)

0.1563 in (40)

0.1875 in (204)

0.2500 in (354)

0.3125 in (352)

0.3750 in (395)

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32 mm (64)

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Yes (2660)

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0.590 in (15.0 mm) (48)

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0.654 in (6.6 mm) (32)

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35.56 mm (18)

37.0 mm (147)

38.0 mm (182)

40.2 mm (90)

41.9 mm (72)

44.5 mm (90)

46.8 mm (72)

B2 Max Shaft Penetration

0.265 in (4)

0.265 in (6.7 mm) (4)

0.276 in (24)

0.276 in (7.0 mm) (40)

0.311 in (12)

0.311 in (7.9 mm) (44)

0.339 in (18)

0.339 in (8.6 mm) (66)

0.354 in (6)

0.354 in (9.0 mm) (12)

0.356 in (12)

0.356 in (9.0 mm) (8)

0.377 in (24)

0.377 in (9.6 mm) (36)

0.378 in (24)

0.378 in (9.6 mm) (117)

0.417 in (10.6 mm) (18)

0.422 in (40)

0.422 in (10.7 mm) (64)

0.442 in (6)

0.442 in (11.2 mm) (15)

0.458 in (12)

0.458 in (11.6 mm) (12)

0.461 in (11.7 mm) (26)

0.467 in (5)

0.467 in (11.8 mm) (5)

0.483 in (11)

0.483 in (12.3 mm) (15)

0.499 in (39)

0.499 in (12.7 mm) (98)

0.517 in (6)

0.517 in (13.1 mm) (12)

0.535 in (13.6 mm) (16)

0.559 in (14.2 mm) (52)

0.570 in (12)

0.570 in (14.5 mm) (30)

0.573 in (12)

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0.579 in (24)

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37.0 mm (185)

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40.2 mm (90)

41.9 mm (88)

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46.8 mm (88)

2993 (4)

Bore Tolerance

+0.001 in / -0.000 in (1130)

+0.001 in / -0.000 in (+0.020 mm / -0.000 mm) (240)

+0.001 in / -0.000 in (+0.025 mm / -0.000 mm) (826)

+0.001 in / -0.000 in (+0.03 mm / -0.00 mm) (2340)

+0.004 in / +0.001 in (56)

+0.010 mm / -0.000 mm (24)

+0.020 mm / +0.000 mm (338)

+0.025 mm / -0.000 mm (856)

+0.03 mm / -0.00 mm (2650)

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Alloy Steel (7770)

Stainless Steel (10)

18-8 300 Series Stainless Steel (680)

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1/4 in (282)

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NK (136)

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14 mm (2)

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Bore (d): low to high

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Name: Z to A
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Price: high to low
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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
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Length (L): high to low

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1.2500 in

20 mm

2.750 in (69.9 mm)

3.431 in (87.1 mm)

BC44-1 1/4"-20MM-A

Ruland Brand / 1 1/4" X 20mm Bores / 44.5mm Od, 56.4mm Length / Bellows Coupling / High Stiffness / Aluminum

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$286.05 / each

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Product Added to Cart and Back Orders

Product Added to Back Orders

15 items added to cart, can be ordered and shipped today.
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Brand

Note

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

Forged Clamp Screw

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

DCDK36-20-18-A

$275.27 / each

DCDK36-20-20-A

$275.27 / each

DCDK36-20-8-A

$275.27 / each

DCDK36-20-10-A

$275.27 / each

DCDK36-20-12-A

$275.27 / each

DCDK36-20-14-A

$275.27 / each

DCDK36-20-16-A

$275.27 / each

BC44-1 1/4"-22MM-A

$286.05 / each

BC44-1 1/4"-24MM-A

$286.05 / each

BC44-1 1/4"-25MM-A

$286.05 / each

BC44-1 1/4"-28MM-A

$286.05 / each

BC44-1 1/4"-20MM-A

$286.05 / each

Product Added to Cart and Back Orders

Product Added to Back Orders

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