Recent content by mc_n_g

Here is info directly from Norton on their diamond grinding wheels This all comes down to what sort of finish do you want. I have used 120 and 150 cups in the past on a Darex and have had no problems resharpening end mills. You will also pay different pricing between 1/16 and 1/8 thickness of...

I have used the A and B profile link belts on a Sheldon 0 mill and a South Bend lathe. One belt had the metal 'rivet' links the other was fabric only. Once they stretch out a little they run fine. You might have to remove a link or two as it stretches and seats. Never had any problems. No wear...

As mentioned above the diametrical pitch (DP) is one factor. The second factor is the pressure angle (PA) as referenced above. Many modern sets are 20 degree PA rather than 14.5 degree. Just pay attention you match the DP and the PA There are many sites with gear formulas available through you...

Here is a PDF of information from Chris Heapy's site (now defunct) It is good information with formulas. Also shows racks and spacing of gear teeth. You can use the rack style to cut the gear teeth if you have a dividing head.

I have used the stand up style threading inserts (TNMC and TPMC) both carbide and HSS for threading on a manual lathe. The lathe has slop in it from 55 years of use. The tools work nicely to thread parts. I have not used the lay down style inserts. I know you need to buy different inserts for...

Out of curiosity, have you tried zirconia alumina belts? Cost is only slightly higher than standard belts and last longer. I have had good luck with them on aluminum, steels, and stainless. They should be cheaper than ceramic based belts.

Something that will help will be an end mill with a small radius (also referred to as bull nose end mills). Something in the neighborhood of 0.025 to 0.050 thou depending upon end mill size. The radius removes most of the sharp circles you are experiencing. The problem is cost. Radiused end...

I did mine on a lathe and cut it like a rack of gears. http://i10.photobucket.com/albums/a140/mc_n_g/machinery/DSCN9757_zpsca606afd.jpg The only form you need to worry about is the single cutter you plunge in which has straight sides...

Your cutter looks good. Make sure to leave about .005" at least for grinding the tooth cutting surface. You will need to clean and grind the front of the teeth to give you a sharp cutting face. If you have the ability and the grinding stone, lightly touch up the sides of the teeth. When you...

I made this one a while back. Slower speeds and plenty of cutting fluid. Take your time. Everything needs to be SHARP with your HSS tool. My tool was cutting on all three sides at once. Peeling off uniform curls while adding cutting fluid.

End mills flex. A square end mill (90 degree) end mill will dig on the side it is cutting. A rounded corner radius end mill will help but not remove 'lines'. A carbide end mill will be stiffer but you will have 'lines'. I am talking about slight corner radius end mill. The following is an...

The Sherline and Taig are nice machines. I would list the Seig as the better 'quality' of the Chinese machines. You will most likely be tinkering with the Seig to fix it up to your liking. That does not mean is not a capable machine. The capability lies mostly with the operator. Expect to pay at...

A new sharp end mill helps but if your machine is not sturdy enough to handle the cut you are going to run into problems. CNC or hand crank mill?? CNC will give much better finish if you know how to program for it. Hand crank machine will leave 'rings' on the bottom. The sides should be ok...

TT is TCMM but you will need to determine your size. If your insert does not have a countersunk hole but has a chipbreaker then it is a TCMM. If it has a countersink and a chipbreaker is it TCMT. I would advise you look up 'carbide insert chart' in Google and look at the images and webpages to...

You could but I would not trust it to be smooth like a ground surface. Are you sure it is not your collets? Make sure you try multiple collets not just one. I guess you measured directly on the cone of the chuck. I would mark the high spot on the outside with a Sharpie. replace the chuck in...