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WDG - FLANGE MOUNT WDG - THREAD MOUNT

WDG SERIES - for Moderate Loads, Compact Designs

 

Part Number Construction

Kerk WDG Anti-backlash Nut Assembly – 303 Stainless Steel Acme Lead Screw and Black Ice TFE Coating

The Kerk® WDG Series anti-backlash acme lead screw assembly utilizes an exceptionally compact design to provide stiffness and balanced accuracy for precise positioning. The patented wedge design locks the anti-backlash nut at the correct preload without excessive drag.

Shorter than other self-compensating nuts with similar performance, the WDG nut permits the design of smaller assemblies without sacrificing stroke length. Nut wear or momentary overload is accommodated through the WDG Series’ compensation mechanism, which maintains positional accuracy in demanding applications.

The standard WDG Series assembly utilizes a self-lubricating acetal nut, axially preloaded, on a 303 stainless steel acme lead screw. End machining to customer specifications and Kerkote® or Black Ice TFE screw coating are optional, as are designs for special operating configurations or environments.

LEAD SCREWS | COMPARISON CHART | SCREW SIZE LIST | NUT FEATURE MATRIX | NUT STYLES

WDG SERIES: FLANGE MOUNT

Screw Ø

Nut Ø

Nut Length

Flange Ø

Flange Thickness

Mounting
Hole Ø

Bolt
Circle Ø

Hub
Length

Hub
Ø

Dynamic
Load

Drag
Torque
(max.)

CAD Model

A
in.
(mm)

B
in.
(mm)

C
in.
(mm)

D
in.
(mm)

E
in.
(mm)

F
in.
(mm)

G
in.
(mm)

H
in.
(mm)

J
in.
(mm)


lbs.
(kg)


oz-in
(NM)

 

3/16
(4)

0.625
(16)
1.05
(26.6)
1.125
(28.6)
0.160
(4.1)
0.143
(3.7)
0.875
(22.2)
0.08
(2.04)
0.625
(15.9)
10
(4.5)
4
(.03)

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7/32
(5)
0.625
(16)
1.05
(26.6)
1.125
(28.6)
0.160
(4.1)
0.143
(3.7)
0.875
(22.2)
0.08
(2.04)
0.625
(15.9)
10
(4.5)
4
(.03)

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1/4
(6)
0.625
(16)
1.05
(26.6)
1.125
(28.6)
0.160
(4.1)
0.143
(3.7)
0.875
(22.2)
0.08
(2.04)
0.625
(15.9)
10
(4.5)
4
(.03)

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5/16
(8)
0.750
(19)
1.32
(33.5)
1.5
(38.1)
0.200
(5.08)
0.200
(5.08)
1.125
(28.6)
0.120
(3.05)
0.750
(19.1)
25
(11.3)
5
(.04)

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3/8
(10)
0.750
(19)
1.32
(33.5)
1.5
(38.1)
0.200
(5.08)
0.200
(5.08)
1.125
(28.6)
0.120
(3.05)
0.750
(19.1)
25
(11.3)
5
(.04)

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7/16
(11)
1.00
(24.4)
2.078
(52.8)
1.750
(44.5)
0.250
(6.35)
0.220
(5.6)
1.406
(35.7)
0.255
(6.48)
1.00
(25.4)
75
(34)
9
(.06)

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1/2
(13)
1.00
(24.4)
2.078
(52.8)
1.750
(44.5)
0.250
(6.35)
0.220
(5.6)
1.406
(35.7)
0.255
(6.48)
1.00
(25.4)
75
(34)
9
(.06))

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Outline Drawing – Kerk Acme Lead Screw Assembly with WDG Flange Mount Anti-backlash Nut

WDG SERIES: THREAD MOUNT

Screw Ø

Nut Ø

Nut Length

Flange Ø

Flange Thickness

Thread

Thread
Length

Dynamic
Load

Drag
Torque
(max.)

CAD Model

A
in.
(mm)

B
in.
(mm)

C
in.
(mm)

D
in.
(mm)

E
in.
(mm)

M*

N
in.
(mm)


lbs.
(kg)


oz-in
(NM)

 

3/16
(4)

0.625
(16)
1.05
(26.6)
1.125
(28.6)
0.160
(4.1)
9/16 - 18 0.240
(6.1)
10
(4.5)
4
(.03)

Download

7/32
(5)
0.625
(16)
1.05
(26.6)
1.125
(28.6)
0.160
(4.1)
9/16 - 18 0.240
(6.1)
10
(4.5)
4
(.03)

Download

1/4
(6)
0.625
(16)
1.05
(26.6)
1.125
(28.6)
0.160
(4.1)
9/16 - 18 0.240
(6.1)
10
(4.5)
4
(.03)

Download

5/16
(8)
0.750
(19)
1.32
(33.5)
1.5
(38.1)
0.200
(5.1)
5/8 - 18 0.320
(8.1)
25
(11.3)
5
(.04)

Download

3/8
(10)
0.750
(19)
1.32
(33.5)
1.5
(38.1)
0.200
(5.1)
5/8 - 18 0.320
(8.1)
25
(11.3)
5
(.04)

Download

7/16
(11)
1.00
(25.4)
2.078
(52.8)
1.750
(44.5)
0.250
(6.35)
15/16 - 16 0.500
(12.7)
75
(34)
9
(.06)

Download

1/2
(13)
1.00
(25.4)
2.078
(52.8)
1.750
(44.5)
0.250
(6.35)
15/16 - 16 0.500
(12.7)
75
(34)
9
(.06)

Download

* metric available as required

Outline Drawing – Kerk Acme Lead Screw Assembly with WDG Thread Mount Anti-backlash Nut