$14.17 ea
Quantity Price (USD)
100 $14.17 ea
250 $10.63 ea
500 $6.38 ea
1000 Request Quote
In Production Lead Time: 1 Week or Less
Ruland SPB-3-FZ, 3/16" Balanced Shaft Collar, Zinc Plated Steel, Two-Piece Clamp Style, 5/8" OD, 0.281" Width


Ruland SPB-3-FZ is a two-piece shaft collar with a 3/16" bore, 5/8" OD, and 0.281" 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. SPB-3-FZ is commonly used for guiding, spacing, stopping, mounting, and component alignment. Equipment manufacturers benefit from the tightly controlled face to bore perpendicularity (TIR of ≤ .002"). 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. SPB-3-FZ 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 ANSI standards to ensure maximum holding power. SPB-3-FZ 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 zinc plated finish for added corrosion resistance. It is RoHS2 and REACH compliant and manufactured in our Marlborough, MA factory under strict controls using proprietary processes.



Bore B

0.1875 in

Bore Tolerance

+.002 in / +.0005 in

Outer Diameter OD

5/8 in

Clearance Diameter C MAX

0.773 in

Width W

0.281 in

Width Tolerance

+.003 in / -.010 in

Fastening Hardware

Forged Clamp Screw


Screw Material

Alloy Steel

Hex Wrench Size

3/32 in

Screw Finish

Zinc Plated

Seating Torque

15 lb-in

Screw Location R

0.210 in

Number of Screws

2 ea

Additional Information

Material Specification

1215 Carbon Steel Bar

Finish Specification

Type II, SC2 Zinc Plating with a Yellow "Trivalent" Chromate Conversion Coating, Meets or Exceeds ASTM B633-98


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.

ISO 9001:2015


Conflict Minerals






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