Drill chuck arbor

[Joe McKeanParticipant @joemckean81940]

[Joe McKeanParticipant @joemckean81940]

I need to purchase a R8 – JT6 drill chuck arbor and looking around there is a wide range of makes and of coarse prices, I'm just wondering if it is worthwhile spending the extra on a recognised brand or just buying a import for about a tenner as it is only going to be used for drilling which by the nature of drill bits is fairly imprecise anyway.

Joe

[Tony Pratt 1Participant @tonypratt1]

I would go for a UK supplier of a named brand, they will all be Chinese but if the item is truly awful you will have some comeback.

Tony

[Mike PooleParticipant @mikepoole82104]

I would be inclined to compare suppliers rather than chase the absolute rock bottom price, suppliers with a name they value will give a service that backs their products and they will have made some effort to source a reliable product. Suppliers who take an interest in the hobby market try to balance a reasonable product at a reasonable price. Suppliers who focus on the professional market will not want to risk losing their business customers who are likely to expect a reliable accurate product and are prepared to pay to get this. Direct imports and some auction type sites offer little other than a keen price, you may get lucky and get a satisfactory product but if it it not then you are left with the hassle of chasing a refund or replacement or writing it off which returns you to square one. This item can be sourced from UK suppliers at a reasonable cost with good service so that is where I would go. I have bought arbors from our hobby suppliers and not been disappointed yet, I also own some genuine Jacobs arbors which do have the edge in quality but the price reflects this and luckily I didn’t have to buy them.

Mike

Edited By Mike Poole on 20/12/2020 08:58:40

[Martin ConnellyParticipant @martinconnelly55370]

The experience I have is that drill chuck arbors are soft where the gap between chuck and machine is. This means that over time even the most carefully made arbor may end up causing run-out, Most of the ones that were bent at work where clearly bent as the fitters swung a large radial arm around and thumped the chuck against a bolted down vice, but some had small amounts of bend from general wear and tear. The chuck arbors were regularly removed to be replaced with Morse taper drills.

Since the arbors were effectively a throw away and replace item we just got cheap ones. Drilling with twist drills is not a precision process, If you want accurately sized holes or straight holes other processes such as reaming and boring need to be employed.

Personally I never use a drill chuck in my R8 spindle. I use an R8-ER32 collet chuck, the collets hold the drill much more securely so the drill never spins in it and it is far more rigid than a tapered drill chuck arbor. For smaller drills that the ER32 cannot grip I have an ER11 holder on a Ø16 parallel shank and a Ø16 R8 collet.

Martin C

Martin C

[EmgeeParticipant @emgee]

Joe

I would go for the arbor from Arceuro, the cost is low and the product will have a warranty, there are a dozen suppliers selling for the similar cost and a few at 5 times the cost.

Emgee

[Joe McKeanParticipant @joemckean81940]

Martin I would agree with using the er collets which I normally do but without a DRO on the mill I find it easier when I have a lot of holes to do on the same piece of work to spot drill, drill, counter bore or ream then chamfer each hole in turn which is a bit of a nuisance if using tools with different size shanks when using collets.

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