Ruland OD21/33-AT Oldham Coupling Disk

Ruland OD21/33-AT is an oldham coupling disk designed to fit hubs with an OD of 1.313″ (33.3mm).

It is a component of a three-piece design consisting of two anodized aluminum or stainless steel hubs press fit onto a center disk. This three-piece design allows for a highly customizable coupling that easily combines clamp or set screw hubs with inch, metric, keyed, and keyless bores.

OD21/33-AT is made from acetal for zero-backlash and high torsional stiffness. Oldham couplings can accommodate all forms of misalignment and are especially useful in applications with high parallel misalignment (up to 10% of the coupling OD).

They operate with low bearing loads protecting sensitive system components such as bearings and have a balanced design for reduced vibration at speeds up to 6,000 RPM. OD21/33-AT is RoHS3 and REACH compliant.

SKU: B00AOC7WKU Categories: Disc, Couplings, Collars & Universal Joiners, Industrial Tags: 634529059975, disk, oldham coupling, ruland, Ruland OD21/33-AT Brand: Ruland

Description

Ruland OD21/33-AT Oldham Coupling Disk

Ruland OD21/33-AT Oldham Coupling Disk, Black Acetal, Bore, 1-5/16″ or 33.3mm OD.

Dimensions
Outer Diameter (OD)	1.313 in (33.3 mm)
Performance Specifications
Rated Torque	70 in-lb (8.00 Nm)	Static Break Torque	350 in-lb (39.5 Nm)
Angular Misalignment	0.5°	Parallel Misalignment	0.008 in (0.20 mm)
Max Parallel Misalignment	0.131 in (3.33 mm)	Axial Motion	0.006 in (0.15 mm)
Torsional Stiffness	111.1 lb-in/Deg (12.66 Nm/Deg)	Moment of Inertia	0.00445 lb-in² (1.303 X 10^-6 kg-m²)
Maximum Speed	4,500 RPM	Full Bearing Support Required?	Yes
Zero-Backlash?	Yes	Mechanical Fuse?	Yes
Additional Information
UPC	634529059975	Country of Origin	USA
Material Specification	Acetal	Finish Specification	Plain
Manufacturer	Ruland Manufacturing	Temperature	-10°F to 150°F (-23°C to 65°C)
Weight (lbs)	0.019900	Tariff Code	8483.60.8000
UNSPC	31163015

Carefully made by Ruland in Marlborough, MA, Oldham couplings are comprised of two hubs pressed fit with either an acetal or nylon disk. Oldham couplings disengage if the disc breaks, acting as a mechanical fuse. Well-suited for handling large amounts of parallel misalignment. Acetal Oldham coupling inserts are zero-backlash and electrically isolating. Maximum is 4,500 RPM. RoHS and Reach compliant. Also called a Oldham coupling insert, disk, or disc.