Q:

Center drilling delrin rod…

I am attempting to build a shroud similar to the ones that Don creates for my SS, using delrin for the insert, rather than aluminum, and making the outer part from an old Maglite I have sitting around. I know it would probably be easier just to have Don make me one, but I thought I would give it a shot first, just to see if I could do it. So, anyhow, the part I am having the most trouble with is center drilling the damn rod – I don’t have a lathe, but I do have a drill press and a vise that has inserts which allow me to hold rod upright while I drill. The problem I am having, however, is getting the hole dead center in the middle of the rod. Anyone have any advice, given my limitations, that would allow me to put a hole lengthwise through the center of 6 inches or so of delrin rod?
Thanks in advance,
Chris

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Viewing 12 replies - 1 through 12 (of 12 total)

quote bikincrazy52:

Is that you learning how to swim? 😉

Naah, looks like he’s got the swimming down, that’s probably the first time at the public pool when a fat chick in a BIKIN waved and batted her eyes at him. 😛

quote bikincrazy52:

Is that you learning how to swim? 😉

No I just got the pict off of Google.

But thanks for trying. We appreciate it. 😀

Is that you learning how to swim? 😉

Sharp,
Thanks for the offer. I willl shoot you a PM so we can get things into order.
Chris

quote WalkonKing:

I also was going to type an answer before anyone else had replied. After I wrote it I erased it because chances are that hole is not going to be straight.

Find someone with a lathe and have them do that long hole for you. That is the easiest and most accurate solution.

Oh what do you know….Sharp has a big lathe and so does Bikincrazy 😆

I’ll bite………………

Loki,

If you get your insert done and fitted the way you want except for the centerdrilling and are not comfortable with that process, you are welcome to send it to me, just cover postage and i’ll complete the drilling operation for you on the lathe. PM me if you need a hand.

Good luck and have fun with it.

I also was going to type an answer before anyone else had replied. After I wrote it I erased it because chances are that hole is not going to be straight.

Find someone with a lathe and have them do that long hole for you. That is the easiest and most accurate solution.

Oh what do you know….Sharp has a big lathe and so does Bikincrazy 😆

quote Yellow Ninja:

g’dmnit, I feel like Shadoh – I started writing before anyone else had answered, Honest

Excellent advice though shrp 😉

Since we were both typing blind, and had pretty much the same answer; I guess I’d have to say “great minds think alike” 🙄 🙄 😉

Don’t know if I want to give myself that much credit though 😯 😆

g’dmnit, I feel like Shadoh – I started writing before anyone else had answered, Honest

Excellent advice though shrp 😉

Mark the center, make sure your drill press is square then use 2 machinsts squares pressed agaisnt the peice one 90 degree’s to the other to make sure that your peice is secured straight up in your vice and then drill.

Use a larger drill bit that you would if you had a lathe to help alleviate any measurement innacuracies.

OR

Depending on the size of your drill press and what you have available you could drill a hole in a thick peice wood the same diameter as the delrin – dont move the peice of wood you just drilled and insert the delrin peice into the hole, change to the smaller bit you want for the hole in the delrin and it should put the hole through the center of the delrin.

you can also clamp a 4×4 to your drill press table, and drill a 1″ hole through the 4×4 which your delrin piece will set down into to hold it in a stable and vertical position directly in line with the centerline of the drill press.

chris,

many “carpenters squares” can be used as a “centerfinder”. It will still be difficult to get the hole perfect over a 6″ length on a drill press. To minimize “wandering” or getting off center, do your bulk cutting/boring of the chambers first, that way the drill will only have to pass through the thin walls of each chamber and have less tendency to wander off center.

may also help to drill to center from each end with a smaller “pilot drill” first, then drill the final diameter straight through. Again to minimize walking/canting.

Good luck and have fun with the project. When you get it right you will have a sense of accomplishment that noone can take away. To me that is part of the fun of these guns.

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