Problems threading a ferrule... Need some advice...

Guerra Cues

Guerra Cues

I build one cue at a time
Silver Member
Hello,
So, most of the times I buy threaded ferrules already...
I have all the taps needed.
This is what I do...
- Chuck the ferrule in the lathe
- Center (1, 2 and 3), drill with a 0.250 or 1/4" drill bit the ferrule.
- Start tapping it with a 5/16x18 tap.
The problem I have is that I get into half of ferrule being tapped and the ferrules starts skidding on the chuck. Does not matter how tight I I tighten the ferrule...
Am I doing something wrong? I do it manually... Should I turn the lathe on low speed in small chunks?
What is you guys advice?
 
I use a letter F drill bit for a 5/16 tap. Are the flutes filled with material when the ferrule starts to spin? It sounds like you are tapping a hole that is too small and/or the flutes are jamed with materal causing the ferrule to slip. Try stoping 1/3 of the way in and remove the tap and blow out the hole and repeat.
 
When I drill and tap ferrules, I use a 1/4 carbide bit and go in as far as I can with the tap. Tapping will sometimes take several ins and outs to get it done right. You need to make sure you clean out the hole and the tap each time you pull out.:wink:

BTW is your tap's nose ground down?
 
Do you back off the tap?

Start the tap in about two turns then back off a half turn before moving forward another turn or two. This helps clear the chips and keep a clean hole. You Can power feed a tap without backing off if you use a little larger hole as suggested above, but the 1/4 inch bit works fine if you tap like I described. I also put short noses on all my common taps that I need in cuework, ground to the size of the hole I will tap into. They help my tap stay perfect on a center line. Not hard to do yourself with a metal lathe and a carbide tool with some patience.
 
tony that titan ferrule material is tricky. you have to back it out then in a little then out then in a little clearing debris each time until u get thru. spin your chuck by hand

if you go too much or too deep is will melt to you tap then u have to cut it off.
 
> Chris is right,the F drill is .257. I also had this problem doing ferrules on my tip lathe,and thought I wasn't getting the chuck tight enough. It turns out I was binding up with chips in the slightly undersized hole.

You should also re-tap using a bottoming tap,plus a modded bottoming tap ground totally flat on the end.

Certain materials can be tricky. Tommy D.
 
its not the bit size its the material. when titan gets hot it melts and sticks. i have the same problem. it isnt easy to work with but it plays nice
 
you will be suprised

BENFICA said:
Hello,
So, most of the times I buy threaded ferrules already...
I have all the taps needed.
This is what I do...
- Chuck the ferrule in the lathe
- Center (1, 2 and 3), drill with a 0.250 or 1/4" drill bit the ferrule.
- Start tapping it with a 5/16x18 tap.
The problem I have is that I get into half of ferrule being tapped and the ferrules starts skidding on the chuck. Does not matter how tight I I tighten the ferrule...
Am I doing something wrong? I do it manually... Should I turn the lathe on low speed in small chunks?
What is you guys advice?
Click to expand...

drill hole with a 17/64 bit you will have no problem!!!
 
Bee wax, and backing out to clear chips every few turns will help. Spin the chuck by hand, it takes longer but you have more control.
 
You must log in or register to reply here.
Back
Top