A70 – 65-110 HP

The A70 gearbox is designed for use on mid-sized rotary cutters, field bins and other applications.

Horse power ratings vary from 65 HP to 110 HP depending on the gear ratio and input shaft speed.


Features:

  • Sturdy construction.
  • Improved output shaft seal protection ring.
  • Output shaft boss for attaching the cutter head. (Welding required.)
  • Tapper Roller bearings.


NOTE: GEARBOXES ARE SHIPPED WITHOUT OIL
. Please fill before use.

PRODUCT SPECS

 P/No   Ratio   540 RPM  1000 RPM  Rotation  Input Shaft
 H.P  Torque  H.P  Torque
 AL00662  1:1  –  –  110  6944  Opposite  13/8″Z6
 AL00664  1:1  –  –  110  6944  Similar  13/8″Z6
 AL00669  1:1.46  75  8753  –  –  Opposite  13/8″Z6
 AL00675  1:1.93  65  7586  –  –  Opposite  13/8″Z6
 AL00677  1:1.93  65  7586  –  –  Opposite  13/4″Z20
 AL00702  1:1.93  65  7586  –  –  Dual  13/8″Z6
Bearings Taper Roller
Lubricant SAE 90 EP Gear Oil 1.12 lt approx. Gearboxes are shipped without oil. Please fill before use.
Weight 38 kg approx

– Not recommended at this input speed.

Rotary Cutter Speeds

Normal agricultural input shaft speeds are 540 or 1000 rev’s per minute depending on the tractor being used. Because of this variation of input speed care must be taken when selecting a gear box for your application. If the blades rotate too slowly they may not cut properly. If the blades rotate too fast you may also experience cutting problems however excessive speed is more likely to cause damage to the machine or serious injury to the operator.

The chart below shows the tip speed in feet per minute for some commonly used cutter blade diameters. This is a guide only to assist you with the selection of your gearbox. You will see that some models are marked as not recommended for the reasons covered above.

ROTARY CUTTER – SPEED SELECTION  
P/No Ratio Input  Output
RPM 

Recommended

Yes / No

Blade Tip Speed ft/minute  
4′4.5′5′5.5′6′

AL00662

AL00664

1:1540No
 – – –  –
  –
1000Yes12588141621573517309
AL00669
1.46:1540Yes
9,92411,16512,40513,64614,887
1000No

AL00675

AL00677

AL00702

1:1.93540Yes
13,1191475916399
1000No

PRODUCT PHOTOS

Click on drawing to enlarge:

AL00702 – A70 Thru shaft gearbox.


Click on drawing to enlarge:

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