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Mountable shaft collars with face holes are designed to mate directly with components such as sprockets, pulleys, and metallic plates. Ruland manufactures them with drilled holes for mounting flexibility or threaded holes for the most secure connection between the collar and mated component. They are offered in steel, aluminum, and 303 stainless steel in bore sizes ranging from 3/8” to 2” and 10mm to 50mm.
Clamp style universal joints improve over set screw style because they do not mar the shaft, offer infinite adjustability, and can be used on all shaft types. Ruland is the only North American supplier of clamp style universal joints and manufactures the clamp feature, bores, and keyways in our advanced manufacturing facility in Marlborough, MA USA. They are available in sizes from 1/4" to 1 1/4” in steel for high strength and stainless steel for corrosion resistance.
Ruland SPK-25-SS is a two-piece shaft collar with a 1 9/16" bore, 3/8" keyway, 2 3/8" OD, and 0.563" width. The clamp style design does not mar the shaft, is easy to remove, and is indefinitely adjustable. SPK-25-SS 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. SPK-25-SS 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. SPK-25-SS is machined from solid bar stock to a fine burr free finish and sourced exclusively from North American mills. 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. It is RoHS3 and REACH compliant and manufactured in our Marlborough, MA factory under strict controls using proprietary processes.
PRODUCT SPECIFICATIONS
Dimensions
Bore (B1)
Larger inner diameter. Should match nominal shaft diameter.
1.5625 in
Bore Tolerance
Variance in finished bore range before installation.
+0.0020 in / +0.0005 in
Keyway (K)
3/8 in
Width (W)
0.563 in
Outer Diameter (OD)
2 3/8 in
Width Tolerance
+0.003 in / -0.010 in
Clearance Diameter (C) MAX
Minimum diameter required to avoid interference with hardware.
2.578 in
Recommended Gap
The recommended gap between halves to maintain during installation. See installation instructions for more information.
0.063 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.
1/4-28
Screw Material
18-8 300 Series Stainless Steel
Hex Wrench Size
Wrench size that fits the screw head to tighten or loosen the screw.
3/16 in
Screw Finish
Surface finish and treatments on supplied hardware.
Bright
Seating Torque
Torque required to install supplied hardware. Use torque wrench for accurate seating torque.
110 lb-in
Screw Location (R)
0.984 in
Number of Screws
2 ea
Additional Information
Material Specification
Type 303 Austenitic, Non-Magnetic Bar
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...
WARNING This product can expose you to the chemical Nickel (metallic)
