I helped one of my young proteges acquire a Crosman Mendozza recently. We mounted a 4x RWS scope I had on it. Now it needs a muzzle brake with a little weight to improve it's balance. So we are making a replica of the Beeman brake out of steel. Will be painted with a durable black urethane paint.
Trued up the scrap steel bar and cut 10 grooves .114 wide (wider than a parting blade)with a profile bit I ground. This is a good exercise for folks learning to part on the lathe. You need the right profile bit, slowish spindle speed, proper feed rate, and apply cutting oil continually as the cut progresses with an acid brush. Just enough to provide lubrication to the cut. Makes a big difference and you can even hear/feel the difference. Too slow of a feed rate will cause chatter. don't be afraid to try increasing feed a little. Once you get the feel for parting you want to do it with power cross feed. Works even better. Maintains the proper feed rate which is 75% of it.
Next the center had to be drilled out. And bored to finished dimension. I'll show the boring bar later
Here 20 yr old Tristan is cutting the tapered end with the compound slide set over about 7 degrees. Feeding by hand he is getting a very good finish. He's so big he makes my 9 inch South Bend lathe look smaller.
Now he is cutting the large 45 degree chamfer on the other end.
I'll post more as we progress on this job. What a blessing it is to have an influence on this fine young man's life. He is such a good guy he influences mine too!
Raise them up in the way you want them to go and they will not depart from it when they are old
Trued up the scrap steel bar and cut 10 grooves .114 wide (wider than a parting blade)with a profile bit I ground. This is a good exercise for folks learning to part on the lathe. You need the right profile bit, slowish spindle speed, proper feed rate, and apply cutting oil continually as the cut progresses with an acid brush. Just enough to provide lubrication to the cut. Makes a big difference and you can even hear/feel the difference. Too slow of a feed rate will cause chatter. don't be afraid to try increasing feed a little. Once you get the feel for parting you want to do it with power cross feed. Works even better. Maintains the proper feed rate which is 75% of it.
Next the center had to be drilled out. And bored to finished dimension. I'll show the boring bar later
Here 20 yr old Tristan is cutting the tapered end with the compound slide set over about 7 degrees. Feeding by hand he is getting a very good finish. He's so big he makes my 9 inch South Bend lathe look smaller.
Now he is cutting the large 45 degree chamfer on the other end.
I'll post more as we progress on this job. What a blessing it is to have an influence on this fine young man's life. He is such a good guy he influences mine too!
Raise them up in the way you want them to go and they will not depart from it when they are old
