DeWalt Core drill - arbor wobble...

[danmanchester]

Afternoon all,

Got a new DeWalt diamond core drill but having problems lining up my new 175mm Arbor for my 127mm diamond bit.

Just looking for some tips on how to best line the pieces up for minimal wobble or for guidance on how much 'wobble' is acceptable?

Both drill and arbor are new and with smaller pieces in the drill I get no wobble so am confident that the chuck is square

Thanks in advance

 

[Norcon]

If its wobbling then something is bent. Make sure the center bit is removed.

 

[danmanchester]

If its wobbling then something is bent. Make sure the center bit is removed.

Thanks Norcon - at the risk of sounding completely thick what do you mean centre bit? It's a keyed chuck and a hex arbor...

Thanks in advance

 

[Norcon]

Does it have a drill bit in the center? Usually 10mm and usually removable.

 

[danmanchester]

Does it have a drill bit in the center? Usually 10mm and usually removable.

Thanks for your quick reply - I've just taken a quick picture...

Untitled

• danmanchester
• 21 Jan 2012
• 1

 

[Norcon]

Sorry not sure what the problem is. Maybe some of the others will have a go. I'm out.

 

[landyandy]

Thanks Norcon - at the risk of sounding completely thick what do you mean centre bit? It's a keyed chuck and a hex arbor...

Thanks in advance

The arbour should have a pilot drill which pops into a hole in the centre of the arbour. If you are using it without the pilot drill then a big core will wobble.

 

[danmanchester]

Thanks Norcon - at the risk of sounding completely thick what do you mean centre bit? It's a keyed chuck and a hex arbor...

Thanks in advance

The arbour should have a pilot drill which pops into a hole in the centre of the arbour. If you are using it without the pilot drill then a big core will wobble.

Thanks for your comments - I plan to use it with both a 28mm and 127mm, no pilot drill for the 28mm.

Not sure it should wobble with just the arbor in? Perhaps I'm feeding it into e chuck wrong?!

 

[Norcon]

Landyandy wrote

If you are using it without the pilot drill then a big core will wobble.

No it won't. Once started it stays steady.
This is the kind of comment I would expect from someone with no experience.
The center bit is not necessary. Any time we use them (which is quite often) we remove the center bit as it usually gets lost.
A timber V block is all you need for start off or your boots.
The Op is obviously a dafty diyer who has never used this kind of equipment. Someone who doesn't know how to use a jacobs chuck should obviously not be using this equipment.

 

[landyandy]

No it won't. Once started it stays steady.

The centre bit is used to get it started.

The center bit is not necessary. Any time we use them (which is quite often)

livin the dream.

 

[Norcon]

The centre bit is used to get it started

Like I said. Not necessary and a hindrence to drilling.

 

[danmanchester]

.The Op is obviously a dafty diyer who has never used this kind of equipment. Someone who doesn't know how to use a jacobs chuck should obviously not be using this equipment.

Not sure that's helpful :/