Search found 394 matches

by Todd Stock
Tue Sep 30, 2014 11:51 pm
Forum: Tools and Jigs
Topic: Which Buffing Machine, or Method??
Replies: 14
Views: 10754

Re: Which Buffing Machine, or Method??

SM buffer...the older one, and now the newer unit. Would have gone for the Parma if they were still in production. For a pro building and doing repairs, it's a timesaver; for an amateur trying to get decent finish on a one-off project, sanding to 1200, then to finer grades, and then to foam pads and...
by Todd Stock
Sat Sep 27, 2014 7:57 am
Forum: Glues and Finishes
Topic: microwave curing of hide glue?
Replies: 17
Views: 8063

Re: microwave curing of hide glue?

Hide does not cure - it dries - so anything that speeds up the drying process (zippier evaporation of water from joint) moves things along faster. I suspect that one-time overheat of the glue will not have as detrimental an effect on cohesive or adhesive performance as repeated overheating does, but...
by Todd Stock
Wed Sep 17, 2014 4:15 pm
Forum: Flat-Top Acoustic Guitars and Bass Guitars
Topic: cutting lacquer for gluing on a bridge
Replies: 13
Views: 3981

Re: cutting lacquer for gluing on a bridge

Done this a lot of different ways, but currently making up a 1/4" MDF template, rout with 1/4" downcut spiral and 3/8" OD bushing. Usually just a .005-.006 deep rout to get to clean wood. Advantages are speed (once the template is made for a particular bridge, just clamp in place and rout) and less ...
by Todd Stock
Thu Sep 11, 2014 7:32 pm
Forum: Wood and Materials Q&A
Topic: Hemlock Tops
Replies: 4
Views: 2676

Re: Hemlock Tops

;-)
by Todd Stock
Wed Sep 10, 2014 5:27 pm
Forum: Wood and Materials Q&A
Topic: Hemlock Tops
Replies: 4
Views: 2676

Hemlock Tops

Now that western hemlock is being actively marketed as a premium top wood, has anyone built with it as a top wood? Pretty sure Martin experimented with both hemlock and larch, and there was a thread on another site from John Arnold re: his use of Eastern hemlock, but specifically interested in weste...
by Todd Stock
Tue Sep 09, 2014 4:22 pm
Forum: Flat-Top Acoustic Guitars and Bass Guitars
Topic: Top and back radius
Replies: 18
Views: 6532

Re: Top and back radius

Ed: My plates tend to stay put at about plate radius, which may be a slight tendency to over-radius the braces or just good luck. I radius the bridge plate and tend to let the plate rest in the dish for a day or so, but have not seen much in the way of a tendency to de-dome unless it's related to st...
by Todd Stock
Tue Sep 09, 2014 2:42 pm
Forum: Flat-Top Acoustic Guitars and Bass Guitars
Topic: Top and back radius
Replies: 18
Views: 6532

Re: Top and back radius

Clamp pressure propagates in roughly a 45 degree (from line of application, so 90 degrees total) cone from point of application - Bob's clamps provide pretty decent overlaps on the upper bout, and assuming each clamp provides a realistic 200 lbs each of clamping pressure, that's 800 lbs on a glue li...
by Todd Stock
Tue Sep 09, 2014 9:08 am
Forum: Flat-Top Acoustic Guitars and Bass Guitars
Topic: Top and back radius
Replies: 18
Views: 6532

Re: Top and back radius

I build with 15' back radius and 28' top radius, except for the UTB, which is radiused to 60' and is glued to the top on a flat caul...works for anything from a Size 5 up to an ABG for correct fretboard extension fit. As to glue-up...rim in mold goes top edge down on 28' dish, back is glued on (with...
by Todd Stock
Tue Sep 09, 2014 7:37 am
Forum: Tools and Jigs
Topic: Steel Bending Slat Questions
Replies: 7
Views: 3460

Re: Steel Bending Slat Questions

A good 'stack' is spring steel/foil/wet white or brown butcher paper/wood/wet paper/foil/slat/blanket/slat...the amount of water that the wood sees is controlled by how wet the paper is before bending...pretty useful for mahogany and other woods that that need to be a little dryer to prevent fiber c...
by Todd Stock
Fri Sep 05, 2014 7:52 am
Forum: Glues and Finishes
Topic: What glue is most invisible?
Replies: 8
Views: 3727

Re: What glue is most invisible?

Any glue will show a line if the joint is not tight and well made. If seeing a glue line with Titebond, look at joinery and clamping as the culprit, versus blaming the adhesive. There should not be a visible line for any of the common luthiery glues (hide, fish, AR/PVA).
by Todd Stock
Sun Aug 24, 2014 9:58 am
Forum: Flat-Top Acoustic Guitars and Bass Guitars
Topic: 14 fret O ???
Replies: 4
Views: 1900

Re: 14 fret O ???

As mentioned, two body shapes for 0 size guitars, with the option to mix and match (option to give the 14 fret 0 body the Norman Blake treatment and use a 12 fret-to-body neck and cutaway to maintain access). Pretty sure there's a PDF of the 14 fret 0 shape in archives. Use UMGF bracing library for ...
by Todd Stock
Fri Aug 22, 2014 11:53 pm
Forum: Glues and Finishes
Topic: How DO you do a Gold top?
Replies: 9
Views: 4311

Re: How DO you do a Gold top?

Terminology is 'touchup gun' in the HF catalog...sorry! While an HVLP gun will work, high pressure (conventional) guns go a better job with this pigment. Try this for link to the HF gun I use for the job (I also have a pretty decent US-made jamb gun from the '80's, but hate to use that for the job, ...
by Todd Stock
Fri Aug 22, 2014 7:36 am
Forum: Glues and Finishes
Topic: How DO you do a Gold top?
Replies: 9
Views: 4311

Re: How DO you do a Gold top?

Yes...but keep in mind that different lacquers can require different thinning schedules, so adjust for what you see with your particular lacquer finishing system...Mohawk/Behlens and McFaddens/Seagraves work for me with the indicated lacquer/thinner combinations using a Harbor Freight or Buffalo (ol...
by Todd Stock
Thu Aug 21, 2014 7:45 pm
Forum: Glues and Finishes
Topic: How DO you do a Gold top?
Replies: 9
Views: 4311

Re: How DO you do a Gold top?

https://fbcdn-sphotos-b-a.akamaihd.net/hphotos-ak-xfp1/t1.0-9/p403x403/1465374_236597796541083_6358919964035399641_n.jpg 1. Sand to 320 2. Seal with four coats of 50/50 gloss lacquer; sand between coats and shoot for a final coat that can be wet sanded to 400 3. Using a jam gun (Harbor Freight has ...