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3/4" (19mm)

Haydon Kerk Lead Screws
Kerk Lead Screw Assemblies are modified acme thread forms optimized for performance and available in a broad range of lead screw diameters, leads, and nut styles, custom designed for your application. Kerk lead screws are self-adjusting, maintenance-free and require no lubrication. Providing maximum accuracy, high repeatability, smooth, quiet operation and low cost, Kerk Lead Screw Assemblies are your best choice for high performance linear motion control.

  • Specifications +


    3/4" (19 mm) Diameter Lead Screw. Diameter Code 075
    Lead Lead Code Left Hand Avail. Outside Diameter (For Reference) Root Diameter (For Reference) Efficiency %*
    in mm
    		in mm in mm
    0.0625 1.59 0063 0.75 19.05 0.671 17.04 25
    0.098 2.5 0098 0.742 18.85 0.626 15.9 35
    0.1 2.54 0100 √ 0.746 18.95 0.624 15.85 35
    0.1667 4.23 0167 0.727 18.47 0.645 16.38 47
    0.197 5 0197 0.745 18.92 0.624 15.85 51
    0.2 5.08 0200 0.741 18.82 0.632 16.05 52
    0.25 6.35 0250 0.731 18.57 0.639 16.23 57
    0.276 7 0276 0.75 19.05 0.624 15.85 59
    0.333 8.46 0333 0.75 19.05 0.624 15.85 64
    0.5 12.7 0500 0.744 18.9 0.623 15.82 73
    0.551 14 0551 0.75 19.05 0.624 15.85 73
    0.591 15 0591 0.749 19.02 0.623 15.82 74
    0.709 18 0709 0.78 19.81 0.65 16.51 77
    0.748 19 0748 0.672 17.07 0.547 13.89 80
    0.787 20 0787 0.78 19.81 0.648 16.46 78
    0.8 20.32 0800 0.75 19.05 0.618 15.7 79
    0.945 24 0945 0.734 18.64 0.633 16.08 80
    1 25.4 1000 √ 0.743 18.87 0.619 15.72 81
    1.5 38.1 1500 √ 0.712 18.08 0.59 14.99 84
    1.969 50 1969 0.751 19.08 0.62 15.75 84
    2 50.8 2000 √ 0.742 18.85 0.611 15.52 84
    2.4 60.96 2400 √ 0.75 19.05 0.62 15.75 84
    3.622 92 3622 √ 0.75 19.05 0.634 16.1 87
    *Listed efficiency are theoretical values based on Kerkote® TFE coated lead screws.
    Shaded areas have been translated from their designed inch or mm dimension to an equivalent mm or inch dimension. 

  • Compatible Nuts +


    3/4"(19mm) Compatible Lead Screw Nuts
    PROPERTY UNITS ZBA NTB VHD BFW
    Dynamic Load Lbs(kg) 55
    (25)    		 150
    (68)    		 350
    (159)    		 350
    (160)
    Static Frictional
    Drag Torque    		 oz-in
    Nm    		 5-9
    (.03-.063)    		 3-7
    (.02-.05)    		 3-7
    (.02-.05)    		 Free
    Wheeling

  • Lubrication Options +


    Haydon Kerk Motion Solutions™ offers multiple options for lubrication. All Kerk® lead screw nuts feature self-lubricating polymers. When maximum performance is required, Kerkote® and Black Ice™ TFE coatings provide unmatched results in the most demanding applications. 

    Kerkote® TFE Coating 

    Kerkote TFE is a soft coating, a long-term dry lubricant that is optimized for softer plastics like acetals and nylons, with or without mechanical reinforcement. Lubrication to the nut / lead screw interface occurs by the nut picking up Kerkote TFE particles from the coating as well as from the migration of the internal lubricant within the plastic nut. The lubricant, although solid, also has some “spreading” ability as in fluid lubricants. Kerkote TFE coated screws provide the maximum level of self-lubrication and should not be additionally lubricated or used in environments where oils or other lubricant contamination is possible. 

    Black Ice™ TFE Coating 

    Black Ice TFE coating shares many of the benefits of Kerkote TFE but, in contrast, is a hard coating that offers exceptional durability in all types of environments, with virtually any type of polymer lead screw nut. Rather than acting as a dry lubricant, Black Ice TFE is an anti-friction coating whose surface properties displace the metal to which it is applied. Though it is not intended for use with metal or glass fiber reinforced nuts, Black Ice TFE is bonded securely to the surface of the lead screw and can withstand abrasion from contamination, rigid polymer systems, fluid impingement and wash down applications. 

    Available Greases 

    TFE coatings are intended to be used without additional lubricants. There are certain applications where external lubrication may be desired. These include the use of nut materials such as glass reinforced plastic or metal. Haydon Kerk Motion Solutions does offer a selection of greases developed specifically for these applications. Please contact a sales engineer for assistance selecting the best lubricant for your requirements.

  • Typical End Machining Features +


    Standard End Machine

  • Part Number Guide +



    LSS

    S

    K

    R

    -

    025

    -

    0024

    -

    XXXX

    Prefix

    Nut Mounting Style

    Lubrication

    Thread Direction

     

    Diameter Code

    Nominal Thread Lead Code

     

    Unique Identifier

    LSS (Screw Only)

    S=Screw Only
    X=Custom

    S=Uncoated
    K=Kerkote TFE Coating
    G=Grease
    N=Nut only
    B=Black Ice TFE Coating

    R=Right hand
    L=Left hand

    (Refer to lead-screw charts for availability)

     

    008μ=.078-in (2)
    012m=.125-in (3.2)
    013m=.133-in (3.3)
    014m=.141-in (3.6)
    016m=.156-in (4)
    018m=.188-in (5)
    021m=.219-in (5.6)
    025=.250-in (6)
    031=.313-in (8)
    037=.375-in (10)
    043=.438-in (11)
    050=.500-in (13)
    062=.625-in (16)
    075=.750-in (19)
    087=.875-in (22)
    093=.938-in (24)

    Refer to LEAD CODE Specifications

     

    Proprietary suffix assigned to a specific customer application. The identifier can apply to either a standard or custom part.

    mMini Series
    μMicro Series


    NOTE: Dashes must be included in Part Number (–) as shown above.

    For applications assistance or order entry, call your the Haydon Kerk Motion Solutions Leadscrew Assemblies technical advisors at 603.213.6290

    Not all thread leads are available in all screw diameters.
    New nuts and leads are continually being added. Contact Haydon Kerk Motion Solutions for latest availability.