- Joined
- Aug 26, 2002
- Messages
- 433
ok, I am asking for help again. I had some real good advice some days ago. What I did was really look at the grinder I bought and now have a slew of questions. The bottom line answer might be I bought a good Sears stone grinder but it wont be a good buffer.
I bought a used Sears grinder, it has a 1/2 hp motor that is 3450 rpm . There is a belt that runs from the motor to a Sears double stone grinder. One wheel is 36 grit the other is 60 grit.
The arbor on the motor is 10/16 inches. The inside diamater of the pulley on the motor is 1 1/8 inches.
On the Grinder, the Arbor is 3/4 of an inch. the inside diamater of the pulley is 1 7/8 inches. So the pulley on the ginder is a little larger then the motor pulley.
The grinder unit is kinda enclosed. You can not switch to a larger pulley on the grinder. There is no room for it.
And the pully on the motor looks about as small as I think they get. So I not sure that I can put a smaller pulley on the motor.
The stones are 8 inch stones. That will be the smallest size buffer you can go. A 6 inch stone or buffer and you would be hitting the front side of the grinder with your hands. If I take off this huge metal safety guard I can fit a 10 inch wheel on it. NOW that only gives me a 1/4 inch clearance from the wheel to the work table. I could raise the grinder attachment with wood blocks if I had to. That would give me more clearance.
I tried to figure out George's calculation for surface feet per minute. I came up with number that didnt make any sense. 150,780 fps. I was guessing at rpm being 3000 rpm, because of the differance in pully size. I dont know how to figure the rpm on this.
Ok now you got all the specs.
What rpm do you think I am buffing at with a 8 inch buffing wheel.
What surface speed am I at ?
Do you think I should go with 10 inch wheels ?
Do you think I should just forget turning this into a buffer and go another route.
OH and as a side note, Sears is something else. They designed the Grinding stones with 1 inch inside diam, so that there are these plastic sleaves they hard fit into the arbor as a spacer for the stones. I had to break the plastic sleaves to get the stone off. Now its look for new sleaves or find a 8 inch stone with 3/4 inch diam hole.
Thanks guys for you help;
Jack
I bought a used Sears grinder, it has a 1/2 hp motor that is 3450 rpm . There is a belt that runs from the motor to a Sears double stone grinder. One wheel is 36 grit the other is 60 grit.
The arbor on the motor is 10/16 inches. The inside diamater of the pulley on the motor is 1 1/8 inches.
On the Grinder, the Arbor is 3/4 of an inch. the inside diamater of the pulley is 1 7/8 inches. So the pulley on the ginder is a little larger then the motor pulley.
The grinder unit is kinda enclosed. You can not switch to a larger pulley on the grinder. There is no room for it.
And the pully on the motor looks about as small as I think they get. So I not sure that I can put a smaller pulley on the motor.
The stones are 8 inch stones. That will be the smallest size buffer you can go. A 6 inch stone or buffer and you would be hitting the front side of the grinder with your hands. If I take off this huge metal safety guard I can fit a 10 inch wheel on it. NOW that only gives me a 1/4 inch clearance from the wheel to the work table. I could raise the grinder attachment with wood blocks if I had to. That would give me more clearance.
I tried to figure out George's calculation for surface feet per minute. I came up with number that didnt make any sense. 150,780 fps. I was guessing at rpm being 3000 rpm, because of the differance in pully size. I dont know how to figure the rpm on this.
Ok now you got all the specs.
What rpm do you think I am buffing at with a 8 inch buffing wheel.
What surface speed am I at ?
Do you think I should go with 10 inch wheels ?
Do you think I should just forget turning this into a buffer and go another route.
OH and as a side note, Sears is something else. They designed the Grinding stones with 1 inch inside diam, so that there are these plastic sleaves they hard fit into the arbor as a spacer for the stones. I had to break the plastic sleaves to get the stone off. Now its look for new sleaves or find a 8 inch stone with 3/4 inch diam hole.
Thanks guys for you help;
Jack
