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Sep 12, 2021 - 9:39:03 AM
334 posts since 8/17/2010

I'm looking for a tuning peg hole reamer. The first problem I'm experiencing is that there are a variety of tapers available. Secondly, these tapers are identified in several different ways. Some specify a degree of taper (ie: 2 degrees), some specify a ration (ie: 1:26) and others specify exact dimensions (ie: 5.12x4.13x 0.39 inches). It's confusing to me. So, my question... Is there a standard taper used for banjo tuning pegs and holes? If so, which one? Thanks for any help you can provide.

Sep 12, 2021 - 10:36:48 AM

1546 posts since 4/13/2009

It is worse than that. Fifth string tuners don't all have the same taper or diameter. Nonetheless, I would go with a reamer from Stewmac

Sep 12, 2021 - 11:31:14 AM
Players Union Member



14805 posts since 8/30/2006

I agree, I’ve used my Stewmac for 13?years
The size and depth of the hole is determined at the bottom of the tuner body
So you make an interference fit even tho the angle is slightly different

Sep 12, 2021 - 12:06:16 PM
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2795 posts since 4/7/2010
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The original post did not specify what type of peg you were planning to fit. Let us know so we offer useful information.

Bob Smakula

Sep 12, 2021 - 6:04:49 PM

334 posts since 8/17/2010

My project is somewhat unusual. I bought an old banjo with a "figure 8" style peg head. But, the upper left ear of the peg head was broken off through the peg hole. So, I've re-shaped the peg head into a Boucher style and plan to install a new tuning peg hole between peg holes 2 and 4. The banjo did not have pegs when I bought it so I'm hoping there is a "standard" taper and I can get a "standard" reamer that will hopefully match the existing tuning peg holes.

Sep 12, 2021 - 7:04:06 PM


New Zealand

11275 posts since 6/29/2003

I use one of the Stewmac reamers. I also locally bought a smaller one and cut it down with my dremel. This was to be able to 'start' a tapered hole from a straight one on Asian banjos with those horrible straight splined 5th string tuners. It works a treat.

Sep 13, 2021 - 4:10:33 AM
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2795 posts since 4/7/2010
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Everyone is assuming you want to fit a geared 5th tuner. But your last post indicates you need to fit a violin style friction peg on the peghead.

Though there are several tapers used in violins over the years, the modern "standard" size is 1:30. You will also need a matching peg shaper.

Bob Smakula

Sep 13, 2021 - 8:50:14 PM

334 posts since 8/17/2010

Thanks, Bob. That helps a lot.

Sep 13, 2021 - 10:51:04 PM

11831 posts since 10/27/2006

Assuming friction pegs, standard fiddle pegs come at 2° — which may or may not be accurate. Fiddle shops use reamers and matching shapers to do the final fit as Bob says.

Stew-Mac tools are very nice but not cheap. There are other luthier supply houses that can get you what you need at less expense.

Sep 14, 2021 - 4:33:56 AM

14034 posts since 6/29/2005

You have to have a dedicated violin peg reamer for violin pegs, which you can get from luthier supplies or cheaper at Amazon

On the same Amazon page as the violin reamer "other related items",  is the standard everyday reamer, which is used to widen regular tuner holes and can be cut off to make a dedicated 5th peg one

As has been mentioned quite correctly, 5th peg tuner shank diameters and tapers are not completely standard, so there is not a "one size fits all", more of a "close but no cigar" in some cases.

Edited by - Ken LeVan on 09/14/2021 04:34:21

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