Recommend a good quality large size drill bit set

BigBlue1 · Mar 27, 2020

Big Barn said:
IF you wanted to use annular cutters in your drill press you will need a 3/4 Weldon adapter to fit your drill press spindle.

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How does that adapter work? At first I thought it was something you put in your drill press chuck that would allow you to insert a weldon shank but after looking closer that doesn't seem to be the case. The shaft is tapered and has a square end. Do you have to remove the standard chuck from the press and swap to this? How hard is that?

Rob

downsizingnow48 · Mar 27, 2020

Someone added a jackshaft to this 70 year old 1/2" Duro press. Makes the chuck speed 300 rpm. I've used it to drill 1" holes with a Champion hole cutter. Slower would be better.

ArlyA · Mar 27, 2020

downsizingnow48 said:
There is a seller on ebay that offers an intermediate pulley kit.

I searched for them on EBay using many different verbiages and came up with none. What are the jack shaft kits call on EB? A Link? Thanks! Here is one company offering them.

downsizingnow48 · Mar 27, 2020

I also use this Jancy annular cutter set with a Jancy drill press adapter. 1/2" to 1-1/16". Works good but your drill press quill needs to be tight.

downsizingnow48 · Mar 27, 2020

Here is the ebay seller I was thinking of.

Walker Turner Delta Rockwell Atlas Craftsman Drill Press Slow Speed Assembly | eBay

Big Barn · Mar 27, 2020

BigBlue1 said:
How does that adapter work? At first I thought it was something you put in your drill press chuck that would allow you to insert a weldon shank but after looking closer that doesn't seem to be the case. The shaft is tapered and has a square end. Do you have to remove the standard chuck from the press and swap to this? How hard is that?

Rob

Rob. You will first need to know the spindle taper on your DP. And then find an adapter to match.

And yes the standard chuck is replaced.

The DP in my previous photo with my homemade reduction has a low speed of 300 RPM iirc. I have a cheap digital tachometer to check machine rpms. eBay. Numerous. Cheap. Free shipping.

This is an option, but personally I don’t think it is the best one for you based on info gleaned from your posts.

dragoneggs · Mar 27, 2020

I don't have a ton of metal drilling experience but I do much better with annular cutters than twist for larger than 1/2in. You are cutting into significantly less metal making your drill press not work so hard, and it keeps the heat down as well.

BigBlue1 · Mar 27, 2020

downsizingnow48 said:
I also use this Jancy annular cutter set with a Jancy drill press adapter. 1/2" to 1-1/16". Works good but your drill press quill needs to be tight.

Those look great. But man all this high-capability machining stuff is expensive! I guess that's the cost of having tools that actually work well.

Rob

downsizingnow48 · Mar 27, 2020

I think your best bet is to get the Champion hole cutter in the size you want. Because it has a pilot bit, it will not wander in a drill press. And like DE says it removes less metal that a equivalent twist drill so can be done with a garden variety drill press rather than a big industrial setup. Buying one at a time does not hurt too much.