McMaster-Carr logo
    Filter by
    Machine Taper Number
    System of Measurement
    Collar Diameter
    Projection
    Head Diameter
    Thread Size
    Industrial Info Snippet
    Grip Angle
    Shank Type
    Head-to-Flange Length
    Specifications Met
    Flange Thickness
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    DFARS Specialty Metals
    Unit of Measure
    Graduations
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    2 Products

    Retention Knobs

    Image of Product. Knob with Coolant Hole. Front orientation. Retention Knobs. Coolant Hole.
    Image of Attribute. Knob with Coolant Hole. Front orientation. Contains Annotated. Coolant Hole.

    Knob with Coolant Hole

    Knob with Coolant Hole

    Attach tool holders such as collet chucks and end mill holders to your CNC machine’s spindle. For proper operation, choose a knob that exactly matches your collet type and spindle dimensions. All meet industrial standards for tensile and shear strength. These knobs are also known as pull studs.
    Coolant Hole—Knobs with a coolant hole let coolant flow through to protect your tools and workpiece.
    Torque
    Range, ft·lbf
    Grip
    Angle
    Projection
    Head
    Dia.
    Collar
    Dia.
    Head-to-Flange
    Lg.
    Flange
    Thk.
    ID
    Min.
    Max.
    Material
    Features
    Mfr.
    Mfr. Model
    No.
    Specs.
    Met
    JIS
    Specification
    Each
    CAT 40 Machine Taper
     
    5/8"-11
    15°1.03"0.748"0.512"0.793"0.28"0.276"4459SteelCoolant HoleLyndex NikkenC40-1500ISO 7388-3JIS B 63394403N11000000
     

    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
     
    back to top