$19.26 ea
Quantity Price (USD)
1 $19.26 ea
20 $11.56 ea
100 $9.63 ea
250 $8.67 ea
500 Request Quote
In stock
Registered users receive a 5% discount
Ruland MSPB-25-F, 25mm Balanced Shaft Collar, Black Oxide Steel, Two-Piece Clamp Style, 45mm OD, 15mm Width


Ruland MSPB-25-F is a two-piece shaft collar with a 25mm bore, 45mm OD, and 15mm width. It has a balanced design with opposing screws for use in high RPM applications such as those found in motors and gearboxes. The clamp style design does not mar the shaft, is easy to remove, and is indefinitely adjustable. It is commonly used for guiding, spacing, stopping, mounting, and component alignment. Equipment manufacturers benefit from the tightly controlled face to bore perpendicularity of Ruland shaft collars, TIR of ≤ 05mm. Perpendicularity is critical for alignment when the shaft collar is used as a load bearing face, mechanical stop, or for mounting components such as gears or bearings. Proprietary processes have been developed by Ruland to maintain superior fit, finish, and holding power. MSPB-25-F is stamped with the Ruland name and bore size for ease of identification. Halves are mated throughout the manufacturing process for proper fit and alignment. Forged screws test beyond DIN 912 12.9 standards to ensure maximum holding power. MSPB-25-F is machined from solid bar stock to a fine burr free finish and sourced exclusively from North American mills. Ruland uses 1215 lead-free steel with a proprietary black oxide finish that produces a fine glossy finish while increasing holding power and resisting corrosion. It is RoHS2 and REACH compliant and manufactured in our Marlborough, MA factory under strict controls using proprietary processes.



Bore B

25 mm

Bore Tolerance

+.050 mm / +.012 mm

Outer Diameter OD

45 mm

Clearance Diameter C MAX

52.1 mm

Width W

15 mm

Width Tolerance

+.076 mm / -.254 mm

Fastening Hardware

Forged Clamp Screw

M6 x 16

Screw Material

Alloy Steel

Hex Wrench Size

5.0 mm

Screw Finish

Black Oxide

Seating Torque

16 Nm

Screw Location R

17.50 mm

Number of Screws

2 ea

Additional Information

Material Specification

1215 Carbon Steel Bar

Finish Specification

Hot Process Black Oxide, Impregnated with Naphthenic Oil, Centrifugally Dried


Ruland Manufacturing

Country of Origin



-40°F to 350°F
-40°C to 176°C

Weight (lbs.)




Product Notes

Note 1

Performance ratings are for guidance only. The user must determine suitability for a particular application.

Prop 65

WARNING This product can expose you to the chemical Ethylene Thiourea, known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to

ISO 9001:2015


Conflict Minerals






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