VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

  #1  
Old 11-14-2017, 01:00 PM
bkervaski's Avatar
bkervaski bkervaski is offline
 
Join Date: Mar 2017
Location: Birmingham, Alabama
Posts: 405
Default Pg 47-14; Stainless Pin

Trying to cut threads into the stainless pins per the plans. I can't get more than about 1/4 inch done before the pin just starts turning in the vise, no matter how much pressure I put on it. The threads that I am cutting are clean.

I feel like I'm missing something obvious here, it seems like it shouldn't be this hard. Using WD-40 for lube and going very slow. New die, Irwin brand, probably not the best.

Any advice?
__________________
#140376 RV-14A QB IO-390 Thunderbolt
Reserved: N196
Progress: Finishing Kit

Last edited by bkervaski : 11-14-2017 at 01:04 PM.
Reply With Quote
  #2  
Old 11-14-2017, 01:07 PM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 6,970
Default

WD-40 is not a very good lubricant (and not what it was designed for though people use it for that)

You will do better with just plain motor oil.
__________________
Any opinions expressed in this message are my own and not necessarily those of my employer.

Scott McDaniels
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
Reply With Quote
  #3  
Old 11-14-2017, 02:23 PM
Ron B. Ron B. is offline
 
Join Date: Nov 2007
Location: Yarmouth, Nova Scotia
Posts: 2,114
Default

I do not recall any problem tapping. I used Rapid tap and a good die. Rather than buying a can, try a local shop and see if you can steel a few drops. It really makes a difference.
__________________
Thanks Ron
RV-10 SOLD
RV-14 Flying
Reply With Quote
  #4  
Old 11-14-2017, 02:25 PM
snoop9erdog snoop9erdog is offline
 
Join Date: Oct 2005
Posts: 129
Default WD-40

Scott is right. WD-40 is not a lubricant. It is a solvent
__________________
Ed Avila
St. Johns, AZ (SJN)
N646A RV9
Worlds longest RV build...but getting there
Reply With Quote
  #5  
Old 11-14-2017, 02:29 PM
asw20c asw20c is offline
 
Join Date: Jun 2010
Location: Edgewood, NM
Posts: 82
Default

WD=water dispersant. It was originally developed for the missiles nuclear weapons ride on if I remember correctly.
__________________
Empennage Complete Except for Tips
Wings Underway
Reply With Quote
  #6  
Old 11-14-2017, 02:36 PM
bkervaski's Avatar
bkervaski bkervaski is offline
 
Join Date: Mar 2017
Location: Birmingham, Alabama
Posts: 405
Default

Thanks, all! Got some suitable lube now and a nicer tap and die set coming, I'll give it a go tomorrow and see how I fare.
__________________
#140376 RV-14A QB IO-390 Thunderbolt
Reserved: N196
Progress: Finishing Kit
Reply With Quote
  #7  
Old 11-14-2017, 03:52 PM
BobTurner BobTurner is offline
 
Join Date: Dec 2011
Location: Livermore, CA
Posts: 4,678
Default

Just checking, you are using proper technique? E.g., cut some new thread, then back off until you feel the metal break off, then forward again.... There’s no reason the second 1/4” should be different from the first - unless you’re not going straight.
Reply With Quote
  #8  
Old 11-14-2017, 03:58 PM
bkervaski's Avatar
bkervaski bkervaski is offline
 
Join Date: Mar 2017
Location: Birmingham, Alabama
Posts: 405
Default

@BobTurner I think I may have damaged the cheap die .. it won't even start now. I have a nicer set coming tomorrow from Amazon with some appropriate oil.
__________________
#140376 RV-14A QB IO-390 Thunderbolt
Reserved: N196
Progress: Finishing Kit
Reply With Quote
  #9  
Old 11-15-2017, 06:53 AM
BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
Posts: 3,991
Default

I got some stainless all thread rod from Grainger, but I went with safety wire in the end. I could not get that rod to thread. As a rolled thread, it is really strong.
__________________
Bill

W&B done
Doing paperwork.
Beginning G3X calibrations.
Reply With Quote
  #10  
Old Yesterday, 01:01 PM
EXflyer EXflyer is offline
 
Join Date: Jan 2016
Location: Chiloquin OR
Posts: 8
Default

I always use Hanson taps and dies along with there drill bits. When I was building my RV3 I ordered the bits in by the package, mostly short length as there was less deflection. Larger ones just enough to get by. Was an aircraft mechanic starting my working life and ended up a heavy duty mechanic. Two things I learned real quick, one use the best drill bits, taps and dies you can get and the second, Snap On is your friend when abusing tools.
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 07:10 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.