Ruland BC12-4-3-A Bellows Clamp Coupling 1/4 In x 3/16 In Bores

Ruland BC12-4-3-A Bellows Clamp Coupling 1/4 In x 3/16 In Bores

Name: Ruland BC12-4-3-A Bellows Clamp Coupling 1/4 In x 3/16 In Bores - Twin Spring Coupling - Universal joint, jaw coupling and elastomeric coupling replacements
SKU: G1448921
Price: 84.99 USD
Availability: InStock

Ruland BC12-4-3-A Bellows Clamp Coupling 1/4 In x 3/16 In Bores.

Ruland BC12-4-3-A is a clamp bellows coupling with 0.2500″ x 0.1875″ bores, 0.750″ OD, and 1.303″ length.

It is zero-backlash and has a balanced design for reduced vibration at high speeds.

BC12-4-3-A is comprised of two anodized aluminum hubs and a stainless steel bellows.

The bellows are able to flex while remaining rigid under torsional loads allowing for all types of misalignment to be accommodated.

This bellows coupling is lightweight and has low inertia making it suitable for applications with speeds up to 10,000 RPM.

Hardware is metric and tests beyond DIN 912 12.9 standards for maximum torque capabilities.

Ruland BC12-4-3-A has five convolutions allowing for high torsional rigidity and making it an excellent fit for precise positioning stepper servo applications as well as encoders.

It is machined from solid bar stock that is sourced exclusively from North American mills and RoHS3 and REACH compliant.

BC12-4-3-A is carefully manufactured in our Marlborough, MA factory under strict controls using proprietary processes.

Ruland BC12-4-3-A Bellows Clamp Coupling 1/4 In x 3/16 In Bores.

SKU: G1448921 Categories: Couplings, Couplings, Collars & Universal Joiners Tags: bellows coupling, coupling, Industrial, ruland

Description

Ruland BC12-4-3-A Bellows Clamp Coupling 1/4 In x 3/16 In Bores

DIMENSIONS
Bore (B1)	0.2500 in	Small Bore (B2)	0.1875 in
B1 Max Shaft Penetration	0.570 in	B2 Max Shaft Penetration	0.570 in
Outer Diameter (OD)	0.750 in	Bore Tolerance	+0.001 in / -0.000 in
Length (L)	1.306 in	Length Tolerance	+/- 0.030 in
Hub Width (LH)	0.410 in	Recommended Shaft Tolerance	+0.0000 in / -0.0005 in
FASTENING HARDWARE
Forged Clamp Screw	M2.5	Screw Material	Alloy Steel
Hex Wrench Size	2.0 mm	Screw Finish	Black Oxide
Seating Torque	1.21 Nm	Number of Screws	2 ea
PEFORMANCE SPECIFICATIONS
Dynamic Torque Reversing	10 lb-in	Angular Misalignment	1.5°
Dynamic Torque Non-Reversing	20 lb-in	Parallel Misalignment	0.004 in
Static Torque	40 lb-in	Axial Motion	0.010 in
Torsional Stiffness	120 lb-in/Deg	Moment of Inertia	0.003073 lb-in²
Maximum Speed	10,000 RPM	Full Bearing Support Required?	Yes
Zero-Backlash?	Yes	Balanced Design	Yes
RECOMMENDED INSTALLATION TOOLS
Torque Wrench	TW:BT-1R-1/4-10.7	Recommended Hex Key	Metric Hex Keys
ADDITIONAL INFORMATION
Material Specification	Hubs: 2024-T351 Aluminum Bar Bellows: Type 321 Stainless Steel	Temperature	-40°F to 200°F (-40°C to 93°C)
Finish Specification	Sulfuric Anodized MIL-A-8625 Type II, Class 2 and ASTM B580 Type B Black Anodize	Bellows Attachment Method	Epoxy
Manufacturer	Ruland Manufacturing	Country of Origin	USA
Weight (lbs)	0.039600	UPC	634529062562
Tariff Code	8483.60.8000	UNSPC	31163018

Ruland BC12-4-3-A Bellows Clamp Coupling 1/4 In x 3/16 In Bores

Ruland bellows couplings are zero-backlash, torsionally stiff, and have a balanced design.

They are made from black anodized aluminum hubs and stainless steel bellows to offer superior performance in precision servo applications.

The stainless steel bellows are ideal for transmitting torque due to their thin walls allowing the coupling to easily flex while remaining rigid under torsional loads.

Bellows couplings can accommodate all forms of misalignment – angular, parallel, and axial motion.

Combining aluminum hubs with stainless steel bellows results in a lightweight, low inertia coupling that is well suited for precision applications found in a variety of industries including semiconductor, solar, printing, packaging, and machine tools.

Bellows couplings have no moving parts ensuring a long maintenance-free life.

Ruland uses a balanced design to reduce vibration in high RPM applications of up to 10,000 PRM.

Ruland bellows couplings are carefully made from select bar stock sourced exclusively from North American mills and are machined to a fine burr-free finish.

Hardware tests beyond DIN 912 12.9 standards for maximum torqueing capabilities.

Ruland, founded in 1937, manufactures all products in our Marlborough, MA USA factory under strict controls using proprietary processes.

Bellows couplings are RoHS2 and REACH compliant.

Ruland BC12-4-3-A Bellows Clamp Coupling 1/4 In x 3/16 In Bores.