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    2 Products

    CAT Taper Retention Knobs

    Image of Product. Front orientation. Retention Knobs. CAT Taper Retention Knobs.
    Image of Attribute. Knob. Front orientation. Contains Annotated. Retention Knobs. CAT Taper Retention Knobs.
    Image of Attribute. Knob with Pilot. Front orientation. Retention Knobs. CAT Taper Retention Knobs.

    Knob

    Knob with Pilot

    Lock tool holders in place on CNC machines with CAT taper spindles when milling, drilling, and routing. All meet industrial standards for tensile and shear strength. These knobs are also known as pull studs. To ensure compatibility with your machine, compare the features on these knobs, such as the location of O-ring seals and the pilot design, to those on your current knob. Use a torque wrench with a retention knob socket or a changeable-head torque wrench to tighten them.
    Knobs with a pilot ensure precise alignment between the tool holder and spindle, reducing vibration and runout. To upgrade a standard knob to one with a pilot, confirm that the pilot diameter is small enough to fit in your tool holder without touching the inner walls where the knob seats.
    Grip Angle—Grip angle is the sloped part of the knob that the machine grips to secure the tool holder. A 15˚ grip angle is sometimes referred to as a 75˚ grip angle. A 30˚ grip angle is sometimes referred to as a 60˚ grip angle.
    Grip
    Angle
    Projection
    Head
    Dia.
    Collar
    Dia.
    Head-to-Flange
    Lg.
    Flange
    Thk.
    Torque Range,
    ft·lbf
    Mfr.
    Mfr. Model
    No.
    Specs.
    Met
    Each
    CAT 40 Machine Taper
     
    5/8"-11
    45°1.266"0.591"0.512"0.99"0.236"44 to 59Lyndex NikkenC40S-4500ASME B5.504403N16000000
     

    Torque Wrenches for CNC Retention Knobs

    Image of ProductInUse. Front orientation. Torque Wrenches. Torque Wrenches for CNC Retention Knobs.
    Image of Product. Front orientation. Torque Wrenches. Torque Wrenches for CNC Retention Knobs.
    Image of Attribute. Front orientation.

    Prevent damage to CNC spindles and tool holders when installing knobs. These wrenches torque retention knobs to manufacturer specs to avoid overtightening that can bend or misalign your setup. Set your torque and the wrench signals when it’s reached with an audible click and an impulse in the grip. All come with a calibration certificate, which includes test measurements that confirm accuracy.
    For Machine
    Taper No.
    Drive
    Size
    Torque
    Graduations
    Opening
    Angle
    Clockwise
    Accuracy
    Mfr.
    For Mfr. Model No.
    Overall
    Lg.
    Specs. Met
    Certificate Type
    Each
    Round Open End Heads—Nonratcheting
     
    ft·lbf, N-m
    CAT 40
    BT 40    		3/4"30 ft·lbf to 150 ft·lbf
    47 N-m to 197 N-m    		1 ft·lbf
    1.4 N-m    		Straight±4%Lyndex NikkenC40-1500
    C40-1500(R)
    C40-1500-MORI
    C40-STD
    C40S-4500
    C40S-4500(H)
    C40S-6000
    PS-B64-1
    B40-1500
    B40-1500(R)
    B40-1500-MORI
    B40-4500
    B40-4500(H)
    B40-FADAL    		21 1/4"ASME B107.14M, ISO 6789Calibration Certificate with Test Data Traceable to DIN6643N20000000
     
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