Snow rpm reducer

   / rpm reducer #1  

spankyz

New member
Joined
Feb 17, 2013
Messages
9
Location
Steep Falls Maine
Tractor
John Deere 650
I have a 1987 JD 650 compact tractor with an agro trend 1000 series rear mount snow blower.
I mounted the snow blower to the front of my tractor and I'm using the belt driven front final drive attachment to power it but the shaft turns 2300rpms - the blower operates at 540rpm. How do I reduce the speed of the tractor shaft or the blower shaft? What part do I need to buy?

Thanks Peter
 
   / rpm reducer #3  
IF I read this correctly you are using a belt system to drive the blower? If yes a simple change in pulley size can be figured using base formulas.

Multiply the known speed of the shaft 2300 by the diameter of its pulley then divide by the diameter of the second pulley the result will be the speed of the second shaft. This will give you the speed at which its running now.

To determine the pulley to attain your required speed Multiply the diameter of the pulley that you are starting with by the number of revolutions per min that its shaft makes: Then divide this by the speed in revolutions per min at which the second shaft should run, the result is the diameter pulley to use.
 
   / rpm reducer #4  
I have a 1987 JD 650 compact tractor with an agro trend 1000 series rear mount snow blower.
I mounted the snow blower to the front of my tractor and I'm using the belt driven front final drive attachment to power it but the shaft turns 2300rpms - the blower operates at 540rpm. How do I reduce the speed of the tractor shaft or the blower shaft? What part do I need to buy?

Thanks Peter

You are using this as the front pto drive ?

FRONT PTO
Cart key PART NO. PART NAME QTY SERIAL NO. REMARKS
1 21H1410 Screw 2 1/4" X 1"
2 12H356 Lock Washer 1 1/4"
3 AR102744 Switch 1 PTO INTERLOCK
4 12H302 Lock Washer 2 1/4"
5 14H786 Nut 2 1/4"
6 AR102743 Wiring Harness 1
7 AM36850 Switch 1
8 AR102742 Wiring Harness 1
9 AM39489 Toggle/Rocker Switch 1
10 R76501 Label 1
Cart key PART NO. PART NAME QTY SERIAL NO. REMARKS
11 19M7166 Cap Screw 6 M10 X 20
12 12M7066 Lock Washer 6 10 mm
13 24M7028 Washer 12 10.500 X 20 X 2 mm
14 CH15329 Disk 4 (NLA)
15 14M7274 Nut 2 M10
16 12M7066 Lock Washer 2 10 mm
17 CH15883 Shim AR
18 CH11883 Washer 2
19 CH16990 Shaft 1 NLA
20 19M7168 Cap Screw 2 M10 X 30
Cart key PART NO. PART NAME QTY SERIAL NO. REMARKS
21 CH15331 Shaft 1
22 CH15332 Key 1
23 CH13494 Snap Ring 1
24 CH16081 Ball Bearing 2 NLA
25 CH15328 Spacer 1
26 CH15327 Housing 1 (NLA)
27 M2056T Shim AR 0.05MM (.002")
M2057T Shim AR 0.13MM (.005"), (ORDER AT146268)
M2058T Shim AR 0.25MM (.010"), (ORDER AT146268)
28 19M7550 Cap Screw 4 M10 X 35 , (HEAD MARKED)
Cart key PART NO. PART NAME QTY SERIAL NO. REMARKS
29 CH15321 Field Winding Coil 1
30 CH15322 Rotor 1
31 CH15325 Spring 4
32 14M7274 Nut 8 M10
33 CH16081 Ball Bearing 2 NLA
34 CH13494 Snap Ring 1
35 CH15324 Washer 1 NLA
36 19M7285 Cap Screw 1 M12 X 30
37 12M7067 Lock Washer 1 12 mm
38 21M7094 Screw 4 M6 X 16
Cart key PART NO. PART NAME QTY SERIAL NO. REMARKS
39 12M7006 Lock Washer 4 6 mm
40 CH15323 Armature 1 COMPLETE
41 LVA801788 Clutch 1 (NLA), (SUB FOR CH15320 OR CH18191)
42 CH16069 Pulley 1
43 CH16071 Plate 1
44 CH16068 Armature 1
45 24M7088 Washer 4 6.600 X 12 X 1.600 mm (SUB FOR CH10522)
46 CH16070 Rivet 4 (NLA)
47 19M5827 Cap Screw 2 M14 X 30
48 12M7068 Lock Washer 2 14 mm
Cart key PART NO. PART NAME QTY SERIAL NO. REMARKS
49 M83733 Nut 1
50 AR99620 Kit 1 (NLA)
 
   / rpm reducer #6  
Considering the time and money to custom tinker some sort of front snowblower. We have a handy little turn key machine at work. A JD 3046 with a front rockshaft and a front pto driven extension from the mid pto . Can't hurt to kick tires at the dealership and run the numbers.
 
   / rpm reducer #7  
Not only will you need to reduce speed but also change the rotation as front mounts rotate opposite of rear PTO units.

The logical method is a gear box designed with proper sized gears. The ratio of gear teeth will give the ratio and gears will change rotation.
 

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