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Large jaw couplings are now being offered for bore sizes up to 1-3/4” or 45 mm and torque capacities of 2,655 in-lbs (300 Nm). These new large jaw couplings are designed for use in precision systems with high deceleration and acceleration curves, such as those found in semiconductor, solar, conveyor, and warehouse automation applications.
Pre-assembled modular mounting systems are designed for adjustability across many mounting applications. Conveyor mounting systems emphasize strict parallel installation using a flange-bolt base and a conveyor rail guide. Sensor mounting systems offer flexibility in a mounting application with adjustable or 90-degree connectors, two-way bases, and various mounting brackets. Both systems include stainless steel rods (with or without scale) from 100mm to 300mm in length, zinc clamping levers, and connectors that allow adjustment of the rods’ position.
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.
Free 2 day shipping for all domestic orders. Free Expedited shipping for all international orders over $399.
Large Inventory
Widest variety of in-stock items in the industry kept in our Marlborough, MA USA factory.
Fast Delivery
All in-stock orders placed before 4:30pm EST will ship same day.
PRODUCT SPECIFICATIONS
Ruland MJC15-4/3.5D-A is a clamp d-bore zero-backlash jaw coupling hub with a 4/3.5D bore, 15.0mm OD, and 21.8mm legnth. The d-bore allows for positive drive in applications where the coupling can not slip. It is a component in a three-piece design consisiting of two aluminum hubs and an elastomeric insert called the spider creating a lightweight low inertia coupling capable of speeds up to 8,000 RPM. 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. Spiders are available in three durometers allowing the user to tailor the performance of the coupling to their application. Ruland jaw couplings have a balanced design for reduced vibration at high speeds. Hardware is metric and tests beyond DIN 912 12.9 standards for maximum torque capabilities. MJC15-4/3.5D-A is machined from bar stock that is sourced exclusively from North American mills and is RoHS3 and REACH compliant. It is 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.
4/3.5D mm
Flat (F)
3.50 mm
Flat Tolerance
+.002”/-.000”
B1 Max Shaft Penetration
The maximum depth the shaft can penetrate into Bore B1.
7.6 mm
Outer Diameter (OD)
0.590 in (15.0 mm)
Bore Tolerance
Variance in finished bore range before installation.
+0.03 mm / -0.00 mm
Hub Width (LH)
7.62 mm
Length (L)
0.860 in (21.8 mm)
Recommended Shaft Tolerance
Acceptable variance in nominal shaft diameter before performance loss.
+0.000 mm / -0.013 mm
Fastening Hardware
Forged Clamp Screw
Inch or metric socket head cap screw size.
M2
Number of Screws
1 ea
Screw Material
Alloy Steel
Screw Finish
Surface finish and treatments on supplied hardware.
Black Oxide
Hex Wrench Size
Wrench size that fits the screw head to tighten or loosen the screw.
1.5 mm
Seating Torque
Torque required to install supplied hardware. Use torque wrench for accurate seating torque.
0.6 Nm
Performance Specifications
Torque Specifications
Torque is dependent on the insert selected. Please see "Recommended Inserts" to select the correct insert for your application.
Torque ratings vary with insert selection
Misalignment
Misalignment is dependent on the insert selected. Please see "Recommended Inserts" to select the correct insert for your application.
Misalignment ratings vary with insert selection
Maximum Speed
8,000 RPM
Moment of Inertia
1.173 x 10-7 kg-m2
Full Bearing Support Required?
Full bearing support is a bearing in close proximity to both sides of the coupling to prevent axial loads that could result in rapid coupling failure.
Yes
Recommended Inserts
Any of these inserts will match this coupling hub.
Zero-Backlash?
Zero-backlash ensures there is no loss of motion during operation.
Yes
Balanced Design
The balanced design allows for reduced vibration at high RPMs.
Yes
Fail Safe?
If the spider fails tenons will interlock preventing the loss of power transmission.
Yes
Additional Information
Weight (lbs)
0.008285
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...
Recommended Gap Between Hubs
The recommended installation gap between the two hubs.
0.020 in (0.50 mm)
Country of Origin
USA
UPC
65432942043
UNSPC
Code used to identify products to standardize nomenclature around the world.
31163011
Tariff Code
8483.60.8000
Product Notes
Note 1
Stainless steel hubs are available upon request.
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 spiders. Under normal/typical conditions the hubs are capable of holding up to the nominal torque of the spiders. Please consult technical support for more assistance.