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Worried about drawbar limits

Thompson

Member
Joined
May 9, 2025
Messages
11
So after reading posts about the weak drawbar on old Brother drill/tap centers, I got nervous. I'm milling aluminum using ER32 toolholders and mostly 8mm endmills but how close am I to the limit? Could the tool slip before it breaks? I really don't want spindle damage
 
If you're using moderate speeds and feeds with 8mm tools in aluminum, you're probably okay, but keeping an eye on pull force is smart. Noticed any signs of slipping or weird tool marks yet?
 
If you're using moderate speeds and feeds with 8mm tools in aluminum, you're probably okay, but keeping an eye on pull force is smart. Noticed any signs of slipping or weird tool marks yet?
Not yet, but I've been watching closely, there are no slipping or odd marks so far, I am just being cautious since I've read a few horror stories, I am thinking of checking pull force just in case
 
With a Brother drill/tap center using ER32 toolholders and 8mm endmills for aluminum, tool slip is unlikely if the collet is clean and torqued to ~100 ft-lbs, but excessive drawbar force or poor maintenance could risk spindle damage over time.
 
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