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Retention Knob DIN69872
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Retention Knob DIN69872

Retention knob is also called CNC pull stud, as a crucial fastening element in CNC machine tools, retention knob is employed to securely tighten the tool holder. Its primary role is to establish a close connection between the tool holder and the spindle, ensuring stability and precision throughout the precessing operation.

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    Description

    The working principle of the retention knob is that the pull tool mechanism inside the spindle pulls the retention knob, making the tool holder tightly adhere to the end face of the spindle, achieving a rigid connection between the tool holder and the spindle, thereby ensuring the stable progress of the cutting process.
    Material of retension knob is ususally alloy steel such as 40Cr, 45# steel etc.
    Retention knobs come in two styles: Type A and Type B.
    Type A features a through-hole, allowing the spindle to discharge water, enabling iron filings to be flushed out by water pressure during drilling. On the other hand, Type B lacks a through-hole but includes a sealing ring groove to prevent coolant leakage from the rear end.

    Features

    1.High Precision
    The dimensional accuracy and positional tolerance requirements are strict to ensure the precise fit with the tool holder and the spindle
    2.High strengh
    It is usually made of high-strength alloy materials. After heat treatment, it exhibit exceptional hardness and wear resistance, enabling it to withstand axial tensile force and vibration during processing
    3.Standardization
    There are various specifications and models, such as the BT series, CAT series, etc. Different models correspond to different spindle and tool holder specifications.

    Parameter

    1

    Model No.

    D

    D1

    D2

    M

    L

    L1

    L2

    LDD-30A(B)

    13

    9

    13

    M12

    44

    24

    19

    LDD-40A(B)

    17

    14

    19

    M16

    54

    26

    20

    LDD-45A(B)

    21

    17

    23

    M20

    65

    30

    23

    LDD-50A(B)

    25

    21

    28

    M24

    74

    34.00

    25

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    Service

    Qingdao Micro Precision Machinery Co., Ltd. has been providing the following CNC tools services to global customers for decades.

    1. Business Type: OEM& ODM Manufacturer 
    2. DRW Format: DWG, PDF, IGS, STEP, SLDPRT, SLDDRW, PRT, DRW, DXF, X_T, etc.
    3. Accepting customization if a certain quantity is reached
    4. QC System: ISO9001: 2008
    5. Our Advantages:
    1). Reliable Quality
    2). Competitive Price
    3). High precision, high quality, tight tolerance
    4). Continuous Improvement
    5). Defect-Free Products
    6). On-Time Delivery
    7). Customer Satisfaction
    8). Excellent After-Sales Service

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