How do you drill with high speed spindle.

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Originally Posted by

You are confusing two issues.

It is true that shaft fan cooled spindles do not perform well at lower speeds but that is not related to torque (or where they are made). A 2.2kw spindle with .8nm of torque will have .8nm of torque at any speed up to the base speed whether it is Chinese or Colombo. If the base speed is 18,000rpm then torque will not drop of until it is higher than that speed. The issue is cooling.

If the fan is connected to the shaft then it moves slower and cools less effectively the lower the spindle speed which is why people pay more for spindles with seperate electric fans. Excess heats causes a variety of issues for motors.

I spent a long time taking advice on this issue when choosing my spindle because I had a choice between paying $950 for a rebuilt shaft fan spindle or paying $ for an electric fan model. I went with the electric fan model because it is for aluminum and it was rated to run anywhere from 1,000rpm up to 24,000 rpm. An otherwise identicle shaft fan model was only rated for 10,000 rpm and above.

Lower spindle speeds do not require upgraded bearings. It is higher speeds and more torque that require different bearings. My spindle has the upgraded ceramic bearings because it is a 24,000 rpm model. The same spindle with a top speed of 18,000rpm uses steel bearings. More speed generates more heat and (as it was explained to me) this can somehow end up with steel bearings getting welded to each other (or something).

You won't find any Chinese router spindles (or any other) where torque starts off low and increases as the rpm goes up. That's not how motors work. Take a look at any of the torque / power / rpm charts provides by Colombo, PDS, HSD, GMT (which is Chinese made) etc. every single one has constant torque up to the base speed and reduces after that.

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None of this is a matter of opinion. If you have seen a torque chart for a spindle that shows torque increasing as the rpm increases, post a link.

The Large Spindle Drilling Guide allows you to easily drill spindle mortises in chair bow and arms from 5/16" up to 5/8" in diameter. The "offset" design allows you to drill centered spindle mortises in arms up to 6" wide, and from 5" to 30" above the seat.

You can also use the Large Spindle Drilling Guide to drill blind spindle mortises from underneath, like for a crest rail and for other non-chairmaking operations; such as casework, stairs, etc.

You can see it in action on our YouTube channel: https://youtu.be/aRkeZ1o8ME0

You may also be interested in the video where we highlight the chairmaking drill bits we recommend for use in our Drilling Guides: https://youtu.be/B1yTXcQ8HUY

The Large Spindle Drilling Guide includes the Guide, one Drill Bushing of your choice, and the Stick Chair Bushing.

Please note: If you add any accessories for the Spindle Drilling Guide with your order (e.g, additional Drill Bushings or Drill Bits), we will refund to you any overages on the shipping charges.

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