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MOCC33-16-A OD21/33-AT OST21-8-A

In stock
Ruland MOCC33-16-A OD21/33-AT OST21-8-A, 16mm x 1/2" Oldham Coupling Bundle, Aluminum, Clamp/Set Screw Style Hubs, 1.313" (33.3mm) OD, 1.875" (47.6mm) Length

PRODUCT SPECIFICATIONS

This Ruland oldham coupling bundle contains MOCC33-16-A, OD21/33-AT, and OST21-8-A. To make a complete assembly you must specify two hubs and one disk. All parts have an OD of 1.313" (33.3mm) and assembled length of 1.875" (47.6mm). MOCC33-16-A is an aluminum clamp hub with a 16mm bore and 5mm keyway. OD21/33-AT is a Acetal disk. OST21-8-A is an aluminum set screw hub with a 0.5000" bore. 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. Hubs are manufactured in our Marlborough, MA factory under strict controls using proprietary processes from bar stock that is sourced exclusively from North American mills. All components in this bundle are RoHS3 and REACH compliant.

PRODUCT SPECIFICATIONS

Dimensions

Bore (B1) Larger inner diameter. Should match nominal shaft diameter.

16 mm

Small Bore (B2) Smaller inner diameter. Should match nominal shaft diameter.

0.5000 in

Keyway (K1)

5 mm

Keyway (K2)

NK

Outer Diameter (OD)

1.313 in (33.3 mm)

Length (L)

1.875 in (47.6 mm)

CERTIFICATIONS/STANDARDS
ISO 9001:2015

Certified

Conflict Minerals

Compliant

RoHS3

Compliant

REACH

Compliant

Dimensions

Bore (B1)

16 mm

Keyway (K)

5 mm

Outer Diameter (OD)

33.3 mm

B1 Max Shaft Penetration

15.0 mm

Bore Tolerance

+0.03 mm / -0.00 mm

Hub Width (LH)

15.00 mm

Length (L)

47.6 mm

Recommended Shaft Tolerance

+0.000 mm / -0.013 mm

Fastening Hardware

Forged Clamp Screw

M3

Number of Screws

1 ea

Screw Material

Alloy Steel

Screw Finish

Black Oxide

Seating Torque

2.1 Nm

Hex Wrench Size

2.5 mm

Performance Specifications

Torque Specifications

Torque ratings vary with insert selection

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)

Moment of Inertia

5.066 x 10-6 kg-m2

Maximum Speed

4,500 RPM

Recommended Inserts

OD21/33-AT, OD21/33-NL, OD21/33-PEK

Full Bearing Support Required?

Yes

Zero-Backlash?

Yes

Balanced Design

Yes

Mechanical Fuse?

Yes

Additional Information

UPC

634529116616

Country of Origin

USA

Material Specification

2024-T351 Aluminum Bar

Finish

Black Anodized

Finish Specification

Sulfuric Anodized MIL-A-8625 Type II, Class 2 and ASTM B580 Type B Black Anodize

Manufacturer

Ruland Manufacturing

Temperature

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)

0.064100

Tariff Code

8483.60.8000

UNSPC

31163015

Product Notes

Note 1

"Now available in stainless steel!"

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 torque disks. Under normal/typical conditions the hubs are capable of holding up to the rated torque of the disks. 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.

Installation Instructions

Installation Instructions

  1. Align the bores of the MOCC33-16-A oldham coupling hubs on the shafts that are to be joined and determine if the misalignment parameters are within the limits of the coupling. (Angular Misalignment: 0.5° Parallel Misalignment: 0.008 in (0.20 mm), Axial Motion: 0.006 in (0.15 mm))
  2. Rotate the hubs on the shaft so the drive tenons are located 90° from each other.
  3. Place a torque disk so one groove fits over the drive tenons of a hub and center the disk by hand.
  4. Insert a shim with the thickness of the coupling's axial motion rating into the groove of the torque disk.
  5. Slide the tenons of the second hub into the mating groove in the disk until it touches the shim stock.
  6. Fully tighten the M3 screw(s) on each hub to the recommended seating torque of 2.1 Nm using a 2.5 mm hex torque wrench.
  7. Remove the shim stock to leave a small gap between the top of the drive tenons and the torque disk to allow for axial movement.

Installation Video

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

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.

Prop 65

WARNING This product can expose you to the chemical Formaldehyde, known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.

Installation Instructions

Installation Instructions

  1. Align the bores of the coupling on the shafts that are to be joined and determine if the misalignment parameters are within the limits of the coupling.(Angular Misialignment: 0.5 deg, Parallel Misalignment: 0.008 in (0.20 mm ), Axial Motion: 0.006 in (0.15 mm )
  2. Rotate the hubs on the shaft so the drive tenons are located 90° from each other.
  3. Place a torque disk so one groove fits over the drive tenons of a hub and center the disk by hand.
  4. Insert a shim with the thickness of the coupling's axial motion rating into the groove of the torque disk.
  5. Slide the tenons of the second hub into the mating groove in the disk until it touches the shim stock.
  6. Fully tighten the screw(s) on each hub to the recommended seating torque using a hex wrench.
  7. Remove the shim stock to leave a small gap between the top of the drive tenons and the torque disk to allow for axial movement.

Installation Video

Dimensions

Bore (B1)

0.5000 in

Outer Diameter (OD)

1.313 in (33.3 mm)

B1 Max Shaft Penetration

0.590 in

Bore Tolerance

+0.001 in / -0.000 in

Hub Width (LH)

0.590 in

Length (L)

1.875 in (47.6 mm)

Recommended Shaft Tolerance

+0.0000 in / -0.0005 in

Fastening Hardware

Forged Set Screw

M4

Number of Screws

2 ea 90° apart

Screw Material

Alloy Steel

Screw Finish

Black Oxide

Seating Torque

2.2 Nm

Hex Wrench Size

2.0 mm

Performance Specifications

Torque Specifications

Torque ratings vary with insert selection

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)

Moment of Inertia

0.0194 lb-in2

Maximum Speed

4,500 RPM

Recommended Inserts

OD21/33-AT, OD21/33-NL, OD21/33-PEK

Full Bearing Support Required?

Yes

Zero-Backlash?

Yes

Balanced Design

Yes

Mechanical Fuse?

Yes

Additional Information

UPC

634529062166

Country of Origin

USA

Material Specification

2024-T351 Aluminum Bar

Finish

Black Anodized

Finish Specification

Sulfuric Anodized MIL-A-8625 Type II, Class 2 and ASTM B580 Type B Black Anodize

Manufacturer

Ruland Manufacturing

Temperature

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)

0.076400

Tariff Code

8483.60.8000

UNSPC

31163015

Product Notes

Note 1

"Now available in stainless steel!"

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 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."

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.

Installation Instructions

Installation Instructions

  1. Align the bores of the OST21-8-A oldham coupling hubs on the shafts that are to be joined and determine if the misalignment parameters are within the limits of the coupling. (Angular Misalignment: 0.5° Parallel Misalignment: 0.008 in (0.20 mm), Axial Motion: 0.006 in (0.15 mm))
  2. Rotate the hubs on the shaft so the drive tenons are located 90° from each other.
  3. Place a torque disk so one groove fits over the drive tenons of a hub and center the disk by hand.
  4. Insert a shim with the thickness of the coupling's axial motion rating into the groove of the torque disk.
  5. Slide the tenons of the second hub into the mating groove in the disk until it touches the shim stock.
  6. Fully tighten the M4 screw(s) on each hub to the recommended seating torque of 2.2 Nm using a 2.0 mm hex torque wrench.
  7. Remove the shim stock to leave a small gap between the top of the drive tenons and the torque disk to allow for axial movement.

Installation Video

CUSTOMER REVIEWS

MOCC33-16-A OD21/33-AT OST21-8-A
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