PTO Shaft List
M1 shafts are used on small timber winches and centrifugal fertilizer spreaders. Transmittable horse power at 540rpm 14 HP, at 1000rpm 22 HP.
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M4 shafts are used on medium tractor winches, small wood chippers, small roto tillers and hay rakes. Transmittable horse power at 540rpm 35 HP, at 1000rpm 55 HP.
M4 SP- 33  Shear pin on one end. M4 SCL-27  Two plate slip clutch on implement end. Mounting with two bolts to the implement shaft. Standard quick coupler on tractor end.                                 M4 SCL-31  Two plate slip clutch on implement end. Mounting with two bolts to implement shaft. Standard quick coupler on tractor end.
M6 shafts are used on large logging winches, medium wood chippers, mowers, snow blowers, roto tillers. Transmittable horse power at 540rpm 60 HP, At 1000 rpm 98 HP.
M6 SLC-32  Two plate slip clutch on implement end. Two bolt mounting to implement shaft. E6 SLC –32  As M6 SLC-32 but has on tractor end 1 3/8" 21 spline hook up. On other end six spline1 3/8". 50lb.
M6 SLC-43  Long shaft with two plate clutch. M6 SLC+FW – 40   Four plate slip clutch on implement end. Clutch end fastened to shaft with bolts.  Free wheel on tractor end.
M6 shafts are used in forestry mowers and large snow blowers . Transmittable horse power at 540 rpm 92 HP. At 1000 rpm 147 HP.
M8 SLC-48  Four plate slip clutch on implement end. Tractor end Six spline 1 3/8". Implement end 1 1/2" . M8 SLC+FW-40 Four plate clutch on implement end. Free wheel on tractor end.  Tractor end 1 3/8" 21 spline. Implement end Six spline 1 3/8".