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Quantity Price (USD)
1 $28.60
20 $26.00
100 $21.67
250 $19.50
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In Production Lead Time: 1 Week or Less
Ruland ENCL45-10-SS, 5/8" Thin Line Shaft Collar, 303 Stainless Steel, One-Piece Clamp Style, 1.772" OD, 0.394" Width

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Ruland ENCL45-10-SS is a one-piece thin line shaft collar with a 0.6250" bore, 1.772" OD, and 0.394" width. The narrow profile reduces weight and allows for use in confined spaces. It has the clamp style benefits of not marring the shaft, easy removability, and indefinite adjustability while commonly being 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. ENCL45-10-SS is stamped with the Ruland name for ease of identification. Forged screws test beyond DIN 912 12.9 standards to ensure maximum holding power. ENCL45-10-SS is manufactured from solid bar stock sourced from select North American mills and machined to a fine burr free finish. Ruland uses 303 stainless steel with hardware of like material for consistent corrosion resistance. Stainless steel hardware undergoes a proprietary surface treatment process to prevent galling. ENCL45-10-SS is RoHS3 and REACH compliant and manufactured in our Marlborough, MA factory under strict controls using proprietary processes.



Bore (B1) Larger inner diameter. Should match nominal shaft diameter.

0.6250 in

Bore Tolerance Variance in finished bore range before installation.

+0.0020 in / +0.0005 in

Outer Diameter (OD)

1.772 in

Clearance Diameter (C) MAX Minimum diameter required to avoid interference with hardware.

1.89 in

Width (W)

0.394 in

Width Tolerance

+0.003 in / -0.010 in

Recommended Shaft Tolerance Acceptable variance in nominal shaft diameter before performance loss.

+0.0000 in / -0.0005 in

Fastening Hardware

Forged Clamp Screw Inch or metric socket head cap screw size.

M4 x 12

Screw Material

18-8 300 Series Stainless Steel

Hex Wrench Size Wrench size that fits the screw head to tighten or loosen the screw.

3.0 mm

Screw Finish Surface finish and treatments on supplied hardware.


Seating Torque Torque required to install supplied hardware. Use torque wrench for accurate seating torque.

2.5 Nm

Screw Location (R)

0.748 in

Number of Screws

1 ea

Additional Information

Material Specification

Type 303 Austenitic, Non-Magnetic Bar

Finish Specification Surface finish specifications.

Bright, No Plating


Ruland Manufacturing

Country of Origin


Temperature Minimum and maximum operating temperature. Operating temperature includes ambient temperature plus or minus factors such as system heat generated during operation, washdown, vacuum, etc...

-40°F to 350°F (-40°C to 176°C)

Weight (lbs)




Tariff Code


UNSPC Code used to identify products to standardize nomenclature around the world.


Product Notes

Note 1

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

Prop 65 Required for the US State of California only.

WARNING This product can expose you to the chemical Nickel (metallic), known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.

ISO 9001:2015


Conflict Minerals






Installation Instructions

  1. Use the ENCL45-10-SS thin line shaft collar as it is received.
  2. Wipe the bore clean.
  3. Apply a thin coat of light oil to the shaft.
  4. Place the collar onto the desired shaft location and tighten it using a 3.0 mm hex wrench until a slight resistance is felt.
  5. Wring collar into its final position and tighten the screw to the full recommended seating torque of 2.5 Nm using a 3.0 mm torque wrench.


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