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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 MOCT19-5/4.5D-A is a clamp d-bore oldham coupling hub with 5/4.5D bore, 19.1mm OD, and 9.7mm length. The d-bore allows for positive drive in applications where the coupling can not slip. It is a component of a three-piece design consisting of two anodized aluminum 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. Disks are available in acetal plastic for zero-backlash and high torsional stiffness, nylon for shock absorption and dampening, and PEEK for high temperature and cleanroom environments. MOCT19-5/4.5D-A can accommodate all forms of misalignment and are especially useful in applications with high parallel misalignment (up to 10% of the OD). It operates with low bearing loads protecting sensitive system components such as bearings and has a balanced design for reduced vibration at speeds up to 6,000 RPM. Hardware is metric and tests beyond DIN 912 12.9 standards for maximum torque capabilities. MOCT19-5/4.5D-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.
5/4.5D mm
Flat (F)
4.50 mm
Flat Tolerance
+.002”/-.000”
Outer Diameter (OD)
0.750 in (19.1 mm)
B1 Max Shaft Penetration
The maximum depth the shaft can penetrate into Bore B1.
9.7 mm
Bore Tolerance
Variance in finished bore range before installation.
+0.03 mm / -0.00 mm
Hub Width (LH)
9.65 mm
Length (L)
1.000 in (25.4 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.
M2.5
Number of Screws
1 ea
Screw Material
Alloy Steel
Screw Finish
Surface finish and treatments on supplied hardware.
Black Oxide
Seating Torque
Torque required to install supplied hardware. Use torque wrench for accurate seating torque.
1.21 Nm
Hex Wrench Size
Wrench size that fits the screw head to tighten or loosen the screw.
2.0 mm
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
Angular Misalignment
Max angle of the shaft axes relative to each other.
0.5°
Parallel Misalignment
Shafts are parallel to each other, but not in-line with each other. They are offset.
0.008 in (0.20 mm)
Max Parallel Misalignment
Oldham couplings can exceed the standard parallel misalignment rating without additional bearing loads. When using at the max rating, life cycle of the insert may be impacted. The user must test for suitability.
0.075 in (1.91 mm)
Axial Motion
The amount shafts can move closer to or away from each other. This is meant for thermal expansion of the shafts. No axial force can be placed on the coupling.
0.004 in (0.10 mm)
Moment of Inertia
3.506 x 10-7 kg-m2
Maximum Speed
4,500 RPM
Recommended Inserts
Any of these inserts will match this coupling hub.
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
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
Mechanical Fuse?
The disc is designed to break at a certain torque. When it reaches the torque, it breaks and power transmission stops.
Sulfuric Anodized MIL-A-8625 Type II, Class 2 and ASTM B580 Type B Black Anodize
Manufacturer
Ruland Manufacturing
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...
Acetal Disk -10°F to 150°F (-23°C to 65°) Nylon Disk -10°F to 130°F (-23°C to 54°C) PEEK Disk -10°F to 300°F (-23°C to 148°C)
Weight (lbs)
0.016032
Tariff Code
8483.60.8000
UNSPC
Code used to identify products to standardize nomenclature around the world.
31163015
Product Notes
Note 1
"Performance ratings are for guidance only. The user must determine suitability for a particular application."
Note 2
"Torque ratings for the couplings are based on the physical limitations/failure point of the torque disks. Under normal/typical conditions the hubs are capable of holding up to the rated torque of the disks. 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 disks. Keyways are available to provide additional torque capacity in the shaft/hub connection when required. Please consult technical support for more assistance."
