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CPRD48-20-A

$105.18
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Ruland CPRD48-20-A, Controlflex Coupling Hub, Aluminum, Clamp Style, 2.953" OD, 2.874" Length

PRODUCT SPECIFICATIONS

Ruland CPRD48-20-A is a Controlflex coupling hub with a 1.2500" bore, 2.953" OD, and 2.874" length. It is a component in a four-piece design consisting of two aluminum hubs mounted by pins to two acetal inserts creating a lightweight low inertia coupling capable of speeds up to 7,500 RPM. This four-piece design allows for a highly customizable coupling that easily combines clamp hubs with inch, metric, keyed, and keyless bores. Hardware is metric and tests beyond DIN 912 12.9 standards for maximum torque capabilities. Controlflex couplings have a balanced design for reduced vibrations at high speeds, can accommodate all forms of misalignment, and are an excellent fit for encoders, tachometers, and light duty stepper servo positioning applications. CPRD48-20-A is RoHS3 and REACH compliant.

PRODUCT SPECIFICATIONS

Dimensions

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

1.2500 in

B1 Max Shaft Penetration The maximum depth the shaft can penetrate into Bore B1.

1.417 in

Outer Diameter (OD)

2.953 in (75.0 mm)

Bore Tolerance Variance in finished bore range before installation.

+0.003 in / +0.001 in

Hub Width (LH)

0.709 in

Length (L)

2.874 in (73.0 mm)

Space Between Hubs (LS)

1.456 in (37.0 mm)

Fastening Hardware

Forged Clamp Screw Inch or metric socket head cap screw size.

M8

Screw Material

Alloy Steel

Hex Wrench Size Wrench size that fits the screw head to tighten or loosen the screw.

6.0 mm

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.

24.0 Nm

Screw Location (R)

25 mm

Number of Screws

1 ea

Performance Specifications

Rated Torque Recommended torque based on slippage on the shaft.

30 Nm

Angular Misalignment Max angle of the shaft axes relative to each other.

1.0°

Peak Torque The torque where the insert will permanently deform and lose elasticity. This will result in loss of zero-backlash.

40 Nm

Torsional Stiffness Measures the rigidity of the coupling. The more rigid the coupling, the less windup it will have.

21.00 Nm/Deg

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.

0.059 in

Parallel Misalignment Shafts are parallel to each other, but not in-line with each other. They are offset.

0.079 in

Maximum Speed

7,500 RPM

Recommended Inserts Any of these inserts will match this coupling hub.

CPFRG48/75-AT

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

Additional Information

Weight (lbs)

0.432200

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...

-22°F to 175°F (-30°C to 80°C)

Material Specification

6082 Aluminum Bar

Finish

Clear Anodized

Finish Specification Surface finish specifications.

Clear Anodized

Manufacturer

Schmidt Kupplung

UPC

634529223321

Country of Origin

Germany

Tariff Code

8483.60.8000

UNSPC Code used to identify products to standardize nomenclature around the world.

31163022

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 inserts. Under normal/typical conditions the hubs are capable of holding up to the rated torque of the inserts. 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. Keyways are available to provide additional torque capacity in the shaft/hub connection when required. Please consult technical support for more assistance.

Prop 65 Required for the US State of California only.

WARNING This product can expose you to chemicals including Ethylene Thiourea and Nickel (metallic), known to the State of California to cause cancer, and Ethylene Thiourea known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

CERTIFICATIONS/STANDARDS
ISO 9001:2015

Certified

Conflict Minerals

Compliant

RoHS3

Compliant

REACH

Compliant

Installation Instructions

  1. Align the bores of the CPRD48-20-A controlflex coupling hub on the shafts that are to be joined with the drive pins facing each other and determine if the misalignment parameters are within the limits of the coupling. (Angular Misialignment: 1.0°, Parallel Misalignment: 2.0 mm, Axial Motion: 1.5 mm)
  2. Rotate the hubs on the shaft so the drive pins are 90° from each other.
  3. Place the first hub at the end of the shaft. Tighten the clamp screw to 24.0 Nm using a 6.0 mm hex torque wrench.
  4. Place an insert(s) with the standoffs facing the hub over the pins of the hub that was just installed.
  5. Align the drive pins on the second hub to match the holes in the insert(s).
  6. Verify that the space between hubs is 1.456 in, 37.0 mm.
  7. Tighten the clamp screw on the second hub to the recommended seating torque of 24.0 Nm using a 6.0 mm hex torque wrench.

CUSTOMER REVIEWS

CPRD48-20-A
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