PHPaul
Platinum Member
- Joined
- Feb 15, 2011
- Messages
- 763
- Location
- Downeast Maine
- Tractor
- Kubota B2650 with cab, Pasquali 986
I posted in another forum about the Jari sicklebar mower I bought. The keyway on the main driveshaft is all hogged out and the drive pulley won't stay on.
Not a huge technical challenge for a machinist to weld up the keyway and cut a new one. Problem is, I don't have a mill to do it myself and I'm too cheap/impatient to drop it off at a machine shop and wait who knows how long for them to get around to it.
So, in the tradition of redneck mechanics everywhere, I cobbled up a way to do it on my drill press:
A regular vise mounted to an inexpensive (Grizzly) cross feed table. Clamp the shaft stock in the vise, use the table height adjustment on the drill press to center the stock on the cutter. Control depth with the Y axis on the cross feed and feed the stock into the cutter with the X axis. Belts on the press set for highest quill speed, obviously.
Several well-oiled shallow cuts later, voila! A new keyway.
Perfect? Not even close. Good enough for the girls I go with? Absolutely. It's a low speed application and works just fine. There are a number of things I'll do differently setup and adjustment-wise for better results next time, but this got me back to cutting brush for now.
Of course, the Kraut in me has ordered a new shaft from Jari to really fix it. $147 with shipping which sort of made me gasp, but when I looked up the price for the pulley (the bore is badly worn on the original) I darn near passed out: $125 plus shipping for a simple half-inch bore keyed 6" pulley for an "A" section belt!
Surplus Center, here I come...
Not a huge technical challenge for a machinist to weld up the keyway and cut a new one. Problem is, I don't have a mill to do it myself and I'm too cheap/impatient to drop it off at a machine shop and wait who knows how long for them to get around to it.
So, in the tradition of redneck mechanics everywhere, I cobbled up a way to do it on my drill press:
A regular vise mounted to an inexpensive (Grizzly) cross feed table. Clamp the shaft stock in the vise, use the table height adjustment on the drill press to center the stock on the cutter. Control depth with the Y axis on the cross feed and feed the stock into the cutter with the X axis. Belts on the press set for highest quill speed, obviously.
Several well-oiled shallow cuts later, voila! A new keyway.
Perfect? Not even close. Good enough for the girls I go with? Absolutely. It's a low speed application and works just fine. There are a number of things I'll do differently setup and adjustment-wise for better results next time, but this got me back to cutting brush for now.
Of course, the Kraut in me has ordered a new shaft from Jari to really fix it. $147 with shipping which sort of made me gasp, but when I looked up the price for the pulley (the bore is badly worn on the original) I darn near passed out: $125 plus shipping for a simple half-inch bore keyed 6" pulley for an "A" section belt!
Surplus Center, here I come...