Question on the StewMac binding jig

[johnc.marple]

Hi.

I have a wide purfling on the top of this build (Herringbone

I cut the width of the purfling and binding first before cutting the depth as per the guidance.

When I do this with a wide purfling the jig has barely anything to rest on and can slip down into the cut, see pictures.  

Should the StewMac binding jig have a larger support ring to accommodate this ?

Regards

J

[JohnParchem]

You should use the brass washer like thing with the bit to move the bearing down

.

[John Charnock]

I have the bearing, but can't see how lateral movement would solve my horizontal problem if that makes sense

Sent from Outlook for Android

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From: obrien...@googlegroups.com <obrien...@googlegroups.com> on behalf of JohnParchem <johnp...@hotmail.com>
Sent: Friday, June 14, 2024 4:45:18 PM
To: Robert O'Brien Guitar Building Forum <obrien...@googlegroups.com>
Subject: Re: Question on the StewMac binding jig

 

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[Fred Brooking]

Try adjusting the limit bar on the front of the vertical supprt aprt of the jig to keep the router from dropping below your intended depth of cut. Its a crude solution and may cause other issues since the tool relies on gravity to compensate for instruments not being perfectly level in the cradle but It may eliminate the possiblitity of the router dropping and cutting into the side/

On Friday, June 14, 2024 at 7:13:30 AM UTC-7 johnc.marple wrote:

[John Charnock]

I had another look at it this evening and that is an option but as you say could be counter productive if not 100% level 

 

I also fitted the brass ring, and it didn’t make any difference

 

I have emailed STMAC customer support

 

J

 

 

From: obrien...@googlegroups.com <obrien...@googlegroups.com> on behalf of Fred Brooking <fbst...@gmail.com>
Date: Friday, 14 June 2024 at 20:16
To: Robert O'Brien Guitar Building Forum <obrien...@googlegroups.com>
Subject: Re: Question on the StewMac binding jig

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[JohnParchem]

whoops I did not understand your issue. The donut ring on my setup has a larger flat area.

[JohnParchem]

Now I see why I always cut the binding channel to depth and then the wide purfling.

[John Charnock]

@John P, that makes sense

 

J

 

From: obrien...@googlegroups.com <obrien...@googlegroups.com> on behalf of JohnParchem <johnp...@hotmail.com>
Date: Friday, 14 June 2024 at 20:29
To: Robert O'Brien Guitar Building Forum <obrien...@googlegroups.com>
Subject: Re: Question on the StewMac binding jig

Now I see why I always cut the binding channel to depth and then the wide purfling.

On Friday, June 14, 2024 at 12:25:59 PM UTC-7 JohnParchem wrote:

whoops I did not understand your issue. The donut ring on my setup has a larger flat area.

On Friday, June 14, 2024 at 9:56:23 AM UTC-7 artrixo wrote:

I have the bearing, but can't see how lateral movement would solve my horizontal problem if that makes sense

 

Sent from Outlook for Android

---

From: obrien...@googlegroups.com <obrien...@googlegroups.com> on behalf of JohnParchem <johnp...@hotmail.com>
Sent: Friday, June 14, 2024 4:45:18 PM
To: Robert O'Brien Guitar Building Forum <obrien...@googlegroups.com>
Subject: Re: Question on the StewMac binding jig

 

You should use the brass washer like thing with the bit to move the bearing down

.

On Friday, June 14, 2024 at 7:13:30 AM UTC-7 johnc.marple wrote:

Hi.

I have a wide purfling on the top of this build (Herringbone

 

I cut the width of the purfling and binding first before cutting the depth as per the guidance.

 

When I do this with a wide purfling the jig has barely anything to rest on and can slip down into the cut, see pictures.  

 

Should the StewMac binding jig have a larger support ring to accommodate this ?

 

Regards

 

J

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[John Charnock]

@john P – I’ll measure mine

 

J

 

From: obrien...@googlegroups.com <obrien...@googlegroups.com> on behalf of JohnParchem <johnp...@hotmail.com>
Date: Friday, 14 June 2024 at 20:26
To: Robert O'Brien Guitar Building Forum <obrien...@googlegroups.com>
Subject: Re: Question on the StewMac binding jig

whoops I did not understand your issue. The donut ring on my setup has a larger flat area.

On Friday, June 14, 2024 at 9:56:23 AM UTC-7 artrixo wrote:

I have the bearing, but can't see how lateral movement would solve my horizontal problem if that makes sense

 

Sent from Outlook for Android

---

From: obrien...@googlegroups.com <obrien...@googlegroups.com> on behalf of JohnParchem <johnp...@hotmail.com>
Sent: Friday, June 14, 2024 4:45:18 PM
To: Robert O'Brien Guitar Building Forum <obrien...@googlegroups.com>
Subject: Re: Question on the StewMac binding jig

 

You should use the brass washer like thing with the bit to move the bearing down

.

On Friday, June 14, 2024 at 7:13:30 AM UTC-7 johnc.marple wrote:

Hi.

I have a wide purfling on the top of this build (Herringbone

 

I cut the width of the purfling and binding first before cutting the depth as per the guidance.

 

When I do this with a wide purfling the jig has barely anything to rest on and can slip down into the cut, see pictures.  

 

Should the StewMac binding jig have a larger support ring to accommodate this ?

 

Regards

 

J

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[johnc.marple]

Stewmac confirmed you have to route the binding first and then the purfling, that's reverse to what Robbie shows in the video course

J

[John Charnock]

I did think of that but the with natural curvature of the guitar the bearing must ride up and down the side a bit.

 

I am happy with StewMac’s response, binding first followed by purfling

 

From: obrien...@googlegroups.com <obrien...@googlegroups.com> on behalf of Fred Brooking <fbst...@gmail.com>
Date: Tuesday, 18 June 2024 at 19:30
To: Robert O'Brien Guitar Building Forum <obrien...@googlegroups.com>
Subject: Re: Question on the StewMac binding jig

I would try raising the stop bar on the front of the vertical support to in effect limit the depth of cut possible, This way the router cannot drop below your intended binding depth if the Nylon doughnut slips off your top. It's admitedly  a crude fix , and may cause other issues since the tool relies on gravity to compensate for inexact leveling of the instrument in the cradle, but.......

On Friday, June 14, 2024 at 9:56:23 AM UTC-7 artrixo wrote:

I have the bearing, but can't see how lateral movement would solve my horizontal problem if that makes sense

 

Sent from Outlook for Android

---

From: obrien...@googlegroups.com <obrien...@googlegroups.com> on behalf of JohnParchem <johnp...@hotmail.com>
Sent: Friday, June 14, 2024 4:45:18 PM
To: Robert O'Brien Guitar Building Forum <obrien...@googlegroups.com>
Subject: Re: Question on the StewMac binding jig

 

You should use the brass washer like thing with the bit to move the bearing down

.

On Friday, June 14, 2024 at 7:13:30 AM UTC-7 johnc.marple wrote:

Hi.

I have a wide purfling on the top of this build (Herringbone

 

I cut the width of the purfling and binding first before cutting the depth as per the guidance.

 

When I do this with a wide purfling the jig has barely anything to rest on and can slip down into the cut, see pictures.  

 

Should the StewMac binding jig have a larger support ring to accommodate this ?

 

Regards

 

J

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[Stephen Foss]

John,

I had the same problem. I put a scrap piece of UMHW into my lathe and turned a new one. Now I'm wondering if it could have been turned using a drill press (it's pretty soft).

Steve

[Charles Tauber]

It could be 3D printed, as well.