PSMR29-12-8-A

$67.35 ea

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1	$67.35 ea
10	$40.41 ea
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Ruland PSMR29-12-8-A, 12mm x 8mm Four Beam Coupling, Aluminum, Set Screw Style, 28.6mm OD, 38.1mm Length

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PRODUCT SPECIFICATIONS

Ruland PSMR29-12-8-A is a four beam coupling with 12mm x 8mm bores, 28.6mm OD, and 38.1mm length. It is machined from a single piece of material and feature two sets of two spiral cuts. This gives it higher torque capacity, lower windup, and larger body sizes than single beam couplings. PSMR29-12-8-A is well suited for applications such as encoders that require high positioning accuracy. This four beam spiral coupling is zero-backlash and has a balanced design for reduced vibration at high speeds of up to 6,000 RPM. All hardware is metric and tests beyond DIN 912 12.9 standards for maximum torque capabilities. PSMR29-12-8-A is made from 7075 aluminum for lightweight and low inertia. It is machined from bar stock that is sourced exclusively from North American mills and is RoHS2 and REACH compliant. PSMR29-12-8-A is manufactured in our Marlborough, MA factory under strict controls using proprietary processes.

PRODUCT SPECIFICATIONS

Dimensions
Large Bore B1	12 mm	Small Bore B2	8 mm
B1 Shaft Penetration	17.6 mm	B2 Shaft Penetration	17.6 mm
Outer Diameter OD	28.6 mm	Bore Tolerance	+.025 mm / -.000 mm
Length L	38.1 mm
Fastening Hardware
Forged Set Screw	M5	Screw Material	Alloy Steel
Hex Wrench Size	2.5 mm	Screw Finish	Black Oxide
Seating Torque	4 Nm	Number of Screws	4 ea
Performance Specifications
Static Torque	3.84 Nm	Angular Misalignment	3°
Dynamic Torque Non-Reversing	1.92 Nm	Parallel Misalignment	0.38 mm
Dynamic Torque Reversing	0.96 Nm	Axial Motion	0.25 mm
Torsional Stiffness	1.96 Deg/Nm	Moment of Inertia	6.349 x10^-6 kg-m²
Maximum Speed	6,000 RPM
Additional Information
Material Specification	7075-T651 Extruded and Drawn Aluminum Bar	Temperature	-40°F to 225°F -40°C to 107°C
Finish Specification	Bright	Manufacturer	Ruland Manufacturing
Country of Origin	USA	Weight (lbs.)	0.1970
UPC	63452903341
Product Notes
Note 1	Torque ratings are at maximum misalignment.	Note 2	Performance ratings are for guidance only. The user must determine suitability for a particular application.
Note 3	Torque ratings for the couplings are based on the physical limitations/failure point of the machined beams. Under normal/typical conditions the hubs are capable of holding up to the rated torque of the machined beams. In some cases, especially when the smallest standard bores are used or where shafts are undersized, slippage on the shaft is possible below the rated torque of the machined beams. Please consult technical support for more assistance.	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 www.P65Warnings.ca.gov.