***** Guitar Project Jigs, Tools & Techniques Online Resources Archives OLF Video Page Library of plans MP3 Library Inlay Class
Offical Luthiers Forum





And our community proudly sponsored by:

RC Tonewoods | Stewart MacDonald | LuthiersForum
TasmanianTonewoods | OLF | OLF MERCH
Luthier Suppliers | Pacific Coast Woods | ELEVATE
OLF X | Tasmanian Acoustic Tonewood | Luthiers Forum Store!
Luthiers Forum | OLF Facebook | AVAIL SPACE
OLF | Alaska Specialty Woods | A.Hix Tonewood
Duke of Pearl | Birkonium CNC | Space




Official Luthiers Forum!

Owned and operated by Lance Kragenbrink
It is currently Thu Aug 07, 2025 7:07 am


Board index » Luthiers Forum Rooms » Guitar Building Forum

All times are UTC - 5 hours


Forum rules


Be nice, no cussin and enjoy!




Post new topic Reply to topic  Page 1 of 1
  [ 8 posts ] 
  Print view Previous topic | Next topic 
Author Message
segovia
PostPosted: Thu Jun 21, 2012 1:33 am 
Offline
Cocobolo
Cocobolo
User avatar

Joined: Thu Aug 13, 2009 4:32 pm
Posts: 480
First name: John
Last Name: Charnock
Country: UK
Focus: Build
Status: Amateur
Whats the best temperature for bending Cherry at appx 2.2mm

Are there any advantages of cooling/leaving the sides in the bender for 12 hours ?

J
Top
 Profile  
 
ernie
PostPosted: Thu Jun 21, 2012 11:35 am 
Offline
Brazilian Rosewood
Brazilian Rosewood
User avatar

Joined: Thu Jan 06, 2011 6:08 pm
Posts: 2712
First name: ernest
Last Name: kleinman
City: lee's summit
State: mo
Zip/Postal Code: 64081
Country: usa
Focus: Build
Status: Professional
John I have bent cherry for a small baritone uke using my silicone heating blanket. The cherry we have here is a little denser and heavier than h. Mahog. which bends readily at 25o deg F. My guess would be 275-300 deg F . I would not leave it for long , cherry IMHO tends to get scorch marks and burn readily when a lot of heat is applied via cutting tools ,think bandsaw, table saw, router bits etc. aggresive sanding , anything that generates high heat seems to leave burn marks , which are a PITA to get rid of.
Top
 Profile  
 
segovia
PostPosted: Thu Jun 21, 2012 11:36 am 
Offline
Cocobolo
Cocobolo
User avatar

Joined: Thu Aug 13, 2009 4:32 pm
Posts: 480
First name: John
Last Name: Charnock
Country: UK
Focus: Build
Status: Amateur
Great thanks, do you wrap it anything - paper - foil?

John
Top
 Profile  
 
Doc
PostPosted: Thu Jun 21, 2012 12:54 pm 
Offline
Cocobolo
Cocobolo

Joined: Fri Mar 13, 2009 3:06 pm
Posts: 154
First name: Howard
Last Name: Wilson
State: Virginia
Country: USA
Focus: Build
Status: Amateur
John,

I'm currently building an OM style cherry guitar of the same thickness. I lightly spritzed the sides with distilled water and sandwiched each with craft paper. Placed that between two metal slats, then a heating blanket outside and finally a metal slat over that. Heated it to around 310 with starting the bending process at 290 at the waist. Bent the lower bout next and finally the upper one. Turned off the heat and let it cool to near room temp, then reheated to 300. Turned off the heat again and left in the bender overnight.

Only problem I encountered was with the tight waist areas--hinted at cracking on the inside. No scorching and minimal springback.

Good luck!
Top
 Profile  
 
segovia
PostPosted: Thu Jun 21, 2012 2:02 pm 
Offline
Cocobolo
Cocobolo
User avatar

Joined: Thu Aug 13, 2009 4:32 pm
Posts: 480
First name: John
Last Name: Charnock
Country: UK
Focus: Build
Status: Amateur
Many thanks, I have stainless slats so i was wondering if the paper/foil sandwich was necessary

I'll use 300 and see how I go

J
Top
 Profile  
 
Joe Beaver
PostPosted: Sat Jun 23, 2012 1:42 pm 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Thu Feb 09, 2006 2:35 pm
Posts: 2951
Location: United States
First name: Joe
Last Name: Beaver
City: Lake Forest
State: California
Focus: Build
I don't know about cherry but SS slats will cause dark stains on many woods. (something to do with the ph of the wood I'd guess) I always use the alumiumn foil in the sandwich. No surprises that way

_________________
Joe Beaver
Maker of Sawdust
Top
 Profile  
 
bluescreek
PostPosted: Sat Jun 23, 2012 2:11 pm 
Offline
Brazilian Rosewood
Brazilian Rosewood

Joined: Mon Jan 28, 2008 5:21 am
Posts: 4915
Location: Central PA
First name: john
Last Name: hall
City: Hegins
State: pa
Zip/Postal Code: 17938
Country: usa
Focus: Build
Status: Professional
Stainless steel won't stain the wood , Spring Steel will . The free iron ions will from the heat and moisture in the bending process. Use a barrier when in doubt.

_________________
John Hall
blues creek guitars
Authorized CF Martin Repair
Co President of ASIA
You Don't know what you don't know until you know it
Top
 Profile  
 
Joe Beaver
PostPosted: Sat Jun 23, 2012 2:16 pm 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Thu Feb 09, 2006 2:35 pm
Posts: 2951
Location: United States
First name: Joe
Last Name: Beaver
City: Lake Forest
State: California
Focus: Build
I guess I misspoke, I do use spring steel slats.

_________________
Joe Beaver
Maker of Sawdust
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  Page 1 of 1
  [ 8 posts ] 

Board index » Luthiers Forum Rooms » Guitar Building Forum

All times are UTC - 5 hours


Who is online

Users browsing this forum: rbuddy and 31 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Group
phpBB customization services by 2by2host.com