Centerdrilling shaft

[JPensack Acker Drill]

When prepping a shaft to be turned, is it acceptable to face and center drill the shaft while chucked close to the end and then slide it out to its length desired and then put the tailstock in? Or does it have to be center drilled at the length it is being machined and not moved then put the tailstock in?

[Guest]

i think it should be center drilled parallel and perpindicular to the shaft and face.

[metalmilita]

I don't trust moving the shaft after you c/drill it, unless it's just for roughing.

[crazy^millman]

I have hand drillied 20 foot shaft before. It really depends on the stock, the operation done before this point, and what will be required of that when you are done. If you are doing CNC work I have always hold it close to the chuck center drilled it then brought it out on smaller machines. On bigger CNC lathes it is really hit or miss. Sometime we will send it over to the coventional department and have them steady rest it and put the center it just becuase we do not have big bore lathe for them to put the material inside of the machine. It the material is close to finish size then we always chuck one end steady rest the other and center drill it. If it is od ground stock like TGP(Turned Ground & Polished) then we always chuck one end and steady rest if big material. If smaller material we make sure the spindle liner is close to the material size so we ensure that the center drilled hole is as close to the center line as possible.

 

HTH

[Guest]

we bought shaft center driller. it has 6 jaws that fits around the od,it is adjustable,and automatically centers the drill.you manually drill it before you chuck it. it works good.

[JPensack Acker Drill]

Thank you for your advice. I'm not sure what I'm going to try yet.

[gms1]

del, can I get some info on that machine? We are going to be making some parts that might require that machine.

[Bruce Caulley]

Del, do you have a link or anything for that?

 

Bruce

[Guest]

let me find ours here so i can find the website.

[Guest]

http://www.rabbittool.com/toolpages/centdrill.html

 

 

here you go. hth

[gms1]

thanks a bunch