Keyless Drill Chuck

[HuubParticipant @huub]

I bought last year the most expensive professional keyless chuck from Paulimot Germany because I didn;t want to wait long. I is the worst piece of shi….. I have in my shop. Has a +0.1 mm runout above 8 mm diameter, the holding force is terrible, the taper is terrible, and it can't be used for tapping because in reverse the tap get lose.

My best drill chuck is a 30+ years old abused chuck from Röhm. The 13 mm keyless Röhm metal drill chuck on a €55 Lidl cordless drill is better than most drill chucks I have.

What you should buy, depends on what you need. I bought a 16 mm MT3 drill chuck from Paulimot for €8,– that was advertised as "runout out of tolerance" and I use it to hold my tapping holder, great buy.

[samuel heywoodParticipant @samuelheywood23031]

Playing devils advocate~ have you considered a keyed chuck?

You don't say what machine it is intended to use this with but for your typical mini lathe/ mill i'd go with a keyed chuck any day~those keyless ones take up half the bed length on a small lathe!

Never owned a really good quality keyless but comparing like for like, a budget Rohm keyed tightens much better than a budget Rohm keyless IMHO.

Plus think of the endless amusement you'll miss out on not having to search for the chuck key.

[not done it yetParticipant @notdoneityet]

Posted by samuel heywood on 13/03/2023 23:55:41:

Playing devils advocate~ have you considered a keyed chuck?

You don't say what machine it is intended to use this with but for your typical mini lathe/ mill i'd go with a keyed chuck any day~those keyless ones take up half the bed length on a small lathe!

Never owned a really good quality keyless but comparing like for like, a budget Rohm keyed tightens much better than a budget Rohm keyless IMHO.

Plus think of the endless amusement you'll miss out on not having to search for the chuck key.

That is why I use keyed chucks with cutters fitted (practically) permanently with my lathe. centre drill and small/large centre drills are in my “Quick change chuck” set. It is quicker to change the chuck than change the item secured within it.

These keyed chucks are old, reliable units and I can store the chuck keys where they won’t get lost! The keyless chuck is quickly and easily fitted for drilling.

As an aside, how much does run-out affect a chuck in the tailstock of a lathe? Rotating chucks, as in pillar drill or mill are a different consideration… but usually only result in larger holes than expected – which assumes perfect drilling machine and bits as well.

[Bo’sunParticipant @bosun58570]

I agree with Vic on that thread. Why make a chuck with a JTS taper that you can't find an arbor for?

If there's source out there for a No.3 MT (M12) JTS arbor, please let me know. I haven't found one yet. Rotagrip don't have one.

[Bo’sunParticipant @bosun58570]

Having failed to source an MT3/JTS Arbor for the Rotagrip Vertex 1 – 10mm KDC, I'm now looking at their "Porta" variants.

They offer the Porta 0 – 10mm KDC's with either B12 or B16 mounting. Although both are the same capacity, why the two different sizes?

Cost isn't the issue, but what do I gain with the B16, which is a larger chuck, but the same capacity?

[Bill PhinnParticipant @billphinn90025]

Posted by Bo'sun on 15/03/2023 12:10:21:

They offer the Porta 0 – 10mm KDC's with either B12 or B16 mounting. Although both are the same capacity, why the two different sizes?

The B12 is for people with an existing B12 arbor, the B16 for those with a B16 one?

[HuubParticipant @huub]

Posted by Bo'sun on 15/03/2023 12:10:21:

Having failed to source an MT3/JTS Arbor for the Rotagrip Vertex 1 – 10mm KDC, I'm now looking at their "Porta" variants.

They offer the Porta 0 – 10mm KDC's with either B12 or B16 mounting. Although both are the same capacity, why the two different sizes?

Cost isn't the issue, but what do I gain with the B16, which is a larger chuck, but the same capacity?

The B16 chuck has a thicker shaft and is more rigid.

The B16 chuck has a longer clamping length and is more suitable for clamping end mills that have a Weldon shaft (flat area on the shaft)

[Author]

Posts