View Single Post
  #16  
Old 10-04-2017, 12:34 PM
John Buchtenkirch John Buchtenkirch is offline
MetalShaper of the Month October 2012
 
Join Date: Jul 2009
Location: Glen Cove, Long Island
Posts: 1,675
Default

Many power hammers do not hit true, meaning unlike Pullmaxes and CP planishing hammers the centerline of the ram may not be truly square to the lower die. The mounting pads (where the upper arm bolts to the pedestal) on both my Pettingells isn’t even a machined surface so how good could they be, I don’t know about Yoder. If you are installing new dies in your hammer they may need tuning / surfaces polished down to get the hit point correct and that can take time. Also dovetails don’t have a standard size so you might have to shim them or have different thickness keys to lock them in if you have dies from several sources. Having said that if your die is tuned for your hammer and you keep a correct key with it you could change dies in under 5 minutes including some time to check your hit point. ~ John Buchtenkirch
__________________
John
Reply With Quote