All models are currently unavailable (see distributor list below)
(if you don't see your model here, we don't have it and can't get it.  See links below and good luck.)

Model Ratio Motor Mount*

Hub Mounting

Input Spline

Notes

rebuilt $450

used $250

W1A100118 18:1
A drive
SAE 'A' 2 bolt Mounting boss dia.= 5.25"
8 equally spaced 1/2" smooth holes on 6.5" bolt circle
3/4" 24 Tooth Spline Older / lighter duty model hub. -
-
W1A100130 30:1
B drive
SAE 'A' 2 bolt Mounting boss dia.= 5.25"
8 equally spaced 1/2" smooth holes on 6.5" bolt circle
3/4" 24 Tooth Spline Older / lighter duty model hub. - -
WR121183 18:1
A drive
SAE 'A' 2 bolt Mounting boss dia.= 5.25"
4 equally spaced 1/2" smooth
holes on 6.5" bolt circle
3/4" 24 Tooth Spline Older / lighter duty model hub. -
-
W1B140324 24:1
A drive
SAE 'B' 2 bolt Mounting boss dia.= 7"
6 equally spaced 5/8"-11 UNC
holes on 8.25" bolt circle
7/8" 13 Tooth Spline Out of stock, see below - -
7970002994 24.4:1
SAE 'B' 4 bolt Mounting boss dia.= 7"
6 equally spaced 5/8"-11 UNC holes on 8.25" bolt circle
Heavy lug studs 5/8"-18
7/8" 13 Tooth Spline replaces W1B660324, built for Grove
--presently in stock-- New, $750 shipped
-
-
W1B140318 18:1
A drive
SAE 'B' 2 bolt Mounting boss dia.= 7"
6 equally spaced 5/8"-11 UNC
holes on 8.25" bolt circle
7/8" 13 Tooth Spline Heavier mounting plate - -
W1A240118 18:1
A drive
SAE 'A' 2 bolt Mounting boss dia.= 5.25"
8 equally spaced 5/8"-11 UNC holes on 6.5" bolt circle
3/4" 24 Tooth Spline   - -
W1A240130 30:1
B drive
SAE 'A' 2 bolt Mounting boss dia.= 5.25"
8 equally spaced 5/8"-11 UNC holes on 6.5" bolt circle
3/4" 24 Tooth Spline   - -
W1A440118 18:1
A drive
SAE 'A' 2 bolt Mounting boss dia.= 5.25"
8 equally spaced 5/8"-11 UNC holes on 6.5" bolt circle
3/4" 24 Tooth Spline   - -
7970002983 35.13:1 SAE 'B' 4 bolt Mounting boss dia.= 7"
6 equally spaced 5/8"-11 UNC holes on 8.25" bolt circle
Heavy lug studs 5/8"-18
7/8" 13 Tooth Spline --No longer in stock-- New, $750 - -

All wheel lug studs in W1 series consists of 9 equally spaced 1/2"-20 UNF lug studs on 9.5" bolt circle except for 7970002994 and 7970002983 which use 5/8"-18 studs, which may require that wheel rims be drilled oversize.  Pilot diameter of hub casing is 7.885".  Older units (W1A100### and WR121183) use six studs in 3 pairs (every third stud absent, but can be reinstalled)

*Motor Mounting Data  (2 bolt only)

SAE code ANSI Flange code SAE HP Rating Mounting
Bolt
Circle (in.)
Mounting
Bolt
Size
Pilot
Diameter
inside
A 82-2 10 4.188 3/8" x 16 3.25
B 101-2 25 5.750 1/2" x 13 4.00

Other sources

Fairfield Manufacturing (manufacturer)
Kraft Fluid Systems (distributor)
Berendsen Fluid Power (distributor)
OEM

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Page last updated  22 April, 2016
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