New drill chuck.

[E T]

I ordered a new Röhm drill chuck and a new MT4/B18 arbor for my drill press.
Arrived today and I put the arbor in the chuck and it wouldn't go in far enough.
On closer examination I found that the chuck taper is B18VK (shortend taper). On the website it just stated B18 taper.
Can I use it like this or is that asking for trouble and do I really need a MT4/B18VK arbor?

 

[brightspark]

is the taper correct on the arbour and does the taper end go right to the bottom of the taper in the chuck

 

[Pete.]

I've got the same chuck and bought an arbor and found the same thing. I use it on my lathe without any problems. A chuck on a drill press might get a harder time but it should be ok.

 

[eddie49]

This table shows that the normal B18 taper depth in a chuck is 32mm:

Drill Chuck Taper Dimensions

The drill chuck taper dimensions here will help you identify the correct arbor for your drill chuck.

www.arceurotrade.co.uk

 

[E T]

is the taper correct on the arbour and does the taper end go right to the bottom of the taper in the chuck

I measured the depth of the chuck at 35mm and the length of the arbor B18 bit at 40mm.
The part that is still protruding now is 14mm. So no, it's not right at the bottom of the chuck taper.

I've got the same chuck and bought an arbor and found the same thing. I use it on my lathe without any problems. A chuck on a drill press might get a harder time but it should be ok.

My thought is that because the chuck is now sticking out more than it should this could put more leverage on the arbor and bend more easily.
I will call the webshop today, but they don't list a B18VK arbor on their website.
In the weekend I will make a wedge to get this one out of the chuck.