Go Back  R/C Tech Forums > General Forums > Electric Off-Road
Countersink Bits for RC? >

Countersink Bits for RC?

Like Tree5Likes
  • 2 Post By Silverbullet555
  • 1 Post By LowClassCC
  • 1 Post By billdelong
  • 1 Post By Rick Vessell

Countersink Bits for RC?

Old 01-23-2022, 02:58 PM
  #1  
Tech Legend
Thread Starter
iTrader: (291)
 
Cain's Avatar
 
Join Date: May 2002
Location: West Fargo, North Dakota
Posts: 33,939
Trader Rating: 291 (100%+)
Default Countersink Bits for RC?

Looking for some countersink bits for metric, probably buy from amazon anything in particular to watch for? Drilling into 1/10 metal chassis.

Last edited by Cain; 01-23-2022 at 03:35 PM.
Cain is online now  
Old 01-23-2022, 04:19 PM
  #2  
Tech Master
iTrader: (13)
 
Join Date: Nov 2020
Location: Idaho
Posts: 1,633
Trader Rating: 13 (100%+)
Default

Just get the right angle.
LowClassCC and rustyus like this.
Silverbullet555 is offline  
Old 01-23-2022, 09:36 PM
  #3  
Tech Master
iTrader: (4)
 
Join Date: Dec 2015
Location: San Jose CA
Posts: 1,101
Trader Rating: 4 (100%+)
Default

Metric is 90 degree, SAE is 82 degrees
belewis01 is offline  
Old 01-24-2022, 07:45 AM
  #4  
Tech Legend
Thread Starter
iTrader: (291)
 
Cain's Avatar
 
Join Date: May 2002
Location: West Fargo, North Dakota
Posts: 33,939
Trader Rating: 291 (100%+)
Default

thanks, looks like a variety all have the same "look" so orderd up a set to give a go. will report back.
Cain is online now  
Old 01-24-2022, 08:19 AM
  #5  
Tech Adept
iTrader: (9)
 
LowClassCC's Avatar
 
Join Date: Mar 2009
Location: Southern Indiana
Posts: 244
Trader Rating: 9 (100%+)
Default

Originally Posted by belewis01 View Post
Metric is 90 degree, SAE is 82 degrees
also some older SAE is 100 degrees
hunterdawg likes this.
LowClassCC is online now  
Old 01-24-2022, 09:14 AM
  #6  
Tech Champion
iTrader: (33)
 
Join Date: Mar 2011
Location: Austin,TX
Posts: 5,869
Trader Rating: 33 (97%+)
Default

I've had really good luck with Perma Grit:

https://www.permagrit.com/fc14/


I drilled holes in a chassis to move the battery tray forward on my Hyper10TT back in the day to get more rotation on turf:




Cain likes this.
billdelong is offline  
Old 01-24-2022, 11:32 AM
  #7  
Tech Master
 
DARKWAV's Avatar
 
Join Date: Nov 2007
Location: San Diego, CA
Posts: 1,116
Default

Originally Posted by belewis01 View Post
Metric is 90 degree, SAE is 82 degrees
Hmmm, didn't know that. Makes me wonder what kind of bit I have been using all this time. I'm going to have to take a closer look at it now.
DARKWAV is online now  
Old 01-27-2022, 01:29 PM
  #8  
Tech Champion
iTrader: (167)
 
ta_man's Avatar
 
Join Date: Nov 2006
Location: New Jersey
Posts: 5,118
Trader Rating: 167 (100%+)
Default

They aren't cheap but what I use are three flute aircraft aluminum countersinks or carbide countersinks. I have one each of the aircraft ones for SAE and Metric. I use the carbide tools for carbon fiber and also for plastics where the 3-flute seems to not give as smooth a cut as it does on aluminum.

Quite honestly, the only way to get a good countersunk hole is to have the workpiece clamped down firmly and a limit stop on the tool held in a drill press or a milling machine. Doing it with a countersink cutter in a hand held too always results in bit chatter. A grinding bit won't chatter but also will not give a good finish and is unlikely to give a proper profile cut.
ta_man is offline  
Old 01-28-2022, 08:24 AM
  #9  
Tech Elite
iTrader: (10)
 
Rick Vessell's Avatar
 
Join Date: Jan 2002
Location: Central IL
Posts: 2,476
Trader Rating: 10 (100%+)
Default

Get one each of 82, 90, and 110. Then you will have every screw you come across covered. The larger, 8/32 screws, etc. use 110'.
Mahjik likes this.
Rick Vessell is offline  

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell or Share My Personal Information -

Copyright © 2023 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.