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    FCMR25-11-9-SS

    $164.18
    Specifications Data Sheet
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    Ruland FCMR25-11-9-SS, 11mm x 9mm Six Beam Coupling, Stainless Steel, Clamp Style, 25.4mm OD, 38.1mm Length

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    PRODUCT SPECIFICATIONS

    Ruland FCMR25-11-9-SS is a clamp style six beam coupling with 11mm x 9mm bores, 25.4mm OD, and 38.1mm length. It is machined from a single piece of material and features two sets of three spiral cuts. This gives it higher torque capacity, lower windup, and larger body sizes than single or four beam couplings and allows for use in light duty power transmission applications such as coupling a servo motor to a lead screw. FCMR25-11-9-SS is zero-backlash and has a balanced design for reduced vibration at high speeds of up to 6,000 RPM. Ruland supplies this spiral coupling with Nypatch® anti-vibration hardware that allows for even seating of the screw, repeated screw installations, prevents galling, and maintains high holding power. All hardware is metric and tests beyond DIN 912 12.9 standards for maximum torque capabilities. FCMR25-11-9-SS is made from 303 stainless steel for increased torque capacity. It is machined from bar stock that is sourced exclusively from North American mills and RoHS3 and REACH compliant. FCMR25-11-9-SS 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.

    11 mm

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

    9 mm

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

    18.3 mm

    B2 Max Shaft Penetration The maximum depth the shaft can penetrate into Bore B2.

    18.3 mm

    Outer Diameter (OD)

    1.000 in (25.4 mm)

    Bore Tolerance Variance in finished bore range before installation.

    +0.025 mm / -0.000 mm

    Length (L)

    1.500 in (38.1 mm)

    Clearance Diameter (C) MAX Minimum diameter required to avoid interference with hardware.

    28.37 mm

    Recommended Shaft Tolerance Acceptable variance in nominal shaft diameter before performance loss.

    +0.000 mm / -0.013 mm
    Fastening Hardware

    Cap Screw Inch or metric socket head cap screw size.

    M4

    Screw Material

    Alloy Steel with Nypatch®

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

    3.0 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.

    4.6 Nm

    Number of Screws

    2 ea
    Performance Specifications

    Dynamic Torque Reversing Max torque when coupling reverses direction without stopping.

    1.10 Nm

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

    3.0°

    Dynamic Torque Non-Reversing Max torque for the coupling during quick changes in acceleration or deceleration.

    2.20 Nm

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

    0.38 mm

    Static Torque Unidirectional constant max torque.

    4.40 Nm

    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.

    0.25 mm

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

    0.74 Deg/Nm

    Moment of Inertia

    11.293 x10-6 kg-m2

    Maximum Speed

    6,000 RPM

    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

    Nypatch® Anti-Vibration Hardware? This proprietary coating allows for repeated installations, prevents screws from coming loose during operation, and provides the necessary dissimilar material in stainless steel couplings to reduce galling.

    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
    Recommended Installation Tools

    Torque Wrench This torque wrench and bit combo is recommended to ensure proper installation. A torque wrench prevents the screw from being over torqued which can lead to product failure.

    TW:BT-1R-1/4-41.0

    Recommended Hex Key This hex key set has the appropriate hex key for product installation. Trained and experienced assemblers can use a hex key in place of a torque wrench.

    Metric Hex Keys
    Additional Information

    Material Specification

    Type 303 Austenitic, Non-Magnetic Bar

    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...

    -40°F to 350°F (-40°C to 176°C)

    Finish Specification Surface finish specifications.

    Bright, No Plating

    Manufacturer

    Ruland Manufacturing

    Country of Origin

    USA

    Weight (lbs)

    0.227300

    UPC

    634529043356

    Tariff Code

    8483.60.8000

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

    31163003
    Product Notes

    Note 1

    Torque ratings are at maximum misalignment.

    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 machined beams. Under normal/typical conditions the hubs are capable of holding up to the rated torque of the machined beams. 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 machined beams. 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 FCMR25-11-9-SS six beam coupling on the shafts that are to be joined and determine if the misalignment parameters are within the limits of the coupling. (Angular Misialignment: 3°, Parallel Misalignment: 0.38 mm, Axial Motion: 0.25 mm)
    2. Fully tighten the M4 screw on one hub to the recommended seating torque of 4.6 Nm using a 3.0 mm hex torque wrench.
    3. Before tightening the screws on the second hub, rotate the coupling by hand to allow it to reach its free length.
    4. Tighten the screws on the second hub to the recommended seating torque. Make sure the coupling remains axially relaxed and the misalignment angle remains centered along the length of the coupling.
    5. The shafts may extend into the relieved portion of the bore as long as it does not exceed the shaft penetration length of 18.3 mm.

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    FCMR25-11-9-SS
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