We make a clutch shaft from a 3-3/4 dia x 20" long piece of 4140 HT'd to 270-320 as the base matl. The part has a splined section requiring induction hardening to 50-55 HRC. We are experiencing a very high percentage of scrappage after induction hardening due to cracking in the splines.
We have...
First the problem:
We make a ring gear that is not durable enough for our customer application. They have made their own gear which they claim lasts longer. We want to get the business back which means we have to make a gear that is equal to or better than theirs but have to be price...
Can anyone give me some guidance/advice?
We make a ring gear 21" od x 19-1/2" id x 1-1/4" thk from HT 4340 (320-360bhn) which is about the hardest that our gearcutter can cut. We burn the rings from annealed plate then HT the rings and then we machine them and gerarcut them
We have a customer...
