VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.






VAF on Twitter:
@VansAirForceNet

  #1  
Old 07-23-2022, 10:57 AM
walldan's Avatar
walldan walldan is offline
 
Join Date: Aug 2014
Location: Spencer, Wisconsin
Posts: 107
Default Uni-Bits

I have been slowly buying tools and when I look at the various websites I see there is a huge variety of uni-bits... some are HHS, Cobalt, Titanium... I see some are make in the USA and most others are China. Not knowing where I will use these in an RV Build, I am wondering if it really matters? Should I spend $100 or can I buy an amazon special?

I suspect better tools will last longer, but not sure how much difference it makes?

DW
__________________
Daniel

Mechanical Engineer
Build Status - Collecting tools and impatiently waiting…
Volunteer Firefighter/EMT
Reply With Quote
  #2  
Old 07-23-2022, 11:28 AM
David Paule David Paule is offline
 
Join Date: Dec 2009
Location: Boulder, CO
Posts: 5,482
Default

I've been using Harbor Freight brand, and I have needed to replace one or two, but aside from that they work fine.

Since I'm building an RV-3B, I might perhaps have needed to use it more than on the other planes.

Dave
Reply With Quote
  #3  
Old 07-23-2022, 11:32 AM
Carl Froehlich's Avatar
Carl Froehlich Carl Froehlich is offline
 
Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 3,919
Default

A three piece set of Irwin is the way to go. For run of the mill holes, the Harbor Freight type stuff is fine - just finish the last bit with the Irwin unibit. The unibits with multiple flutes tend to not make smooth holes.

My original set lasted for three SB RVs. Go slow with good pressure on Stainless Steel however as once it heats up it tends to be Kyrptonite for all drill bits, including unibits.

Carl
Reply With Quote
  #4  
Old 07-23-2022, 01:32 PM
rockwoodrv9 rockwoodrv9 is offline
 
Join Date: Dec 2011
Location: Meridian ID, Aspen CO, Okemos MI
Posts: 3,203
Default

I used the cheap ones. I did find that using them on fiberglass was the ticket to needing new ones.
__________________
rockwoodrv9a
Williamston MI
O-320 D2A
Flying N376E
Reply With Quote
  #5  
Old 07-23-2022, 02:13 PM
rocketman1988 rocketman1988 is offline
 
Join Date: Jun 2010
Location: Sunman, IN
Posts: 3,178
Default be aware...

Be aware that the hf may not be exactly the diameter the you are looking for...

I found that to be the case when drilling for a snap bushing; the holes were either too small, or a bit too large to ensure a good fit ...YMMV
__________________
Bob
EAA Tech Counselor
Aerospace Engineer '88

RV-10-ER
N464RL
Going to Paint at Evoke!
Garmin G3X-T, Barrett EFII S32, CAI, MTV-9B

Dues+ Paid 2021,...Thanks DR+
Reply With Quote
  #6  
Old 07-24-2022, 11:32 AM
g zero g zero is offline
 
Join Date: Jun 2007
Location: palm coast fl.
Posts: 1,061
Default Uni bits

HF makes a few different types , self feed ( spiral) & regular cut . We go through 50-80 a year at work , they are a bargain compared to the Greenlee & other brands . Proper RPM & Edge Lube helps longevity.
__________________
Rv8
N 666 TA
First Flight 2-3-2015 🚀
Reply With Quote
  #7  
Old 07-24-2022, 05:23 PM
wirejock's Avatar
wirejock wirejock is offline
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 5,690
Default Unibit

Quote:
Originally Posted by David Paule View Post
I've been using Harbor Freight brand, and I have needed to replace one or two, but aside from that they work fine.

Since I'm building an RV-3B, I might perhaps have needed to use it more than on the other planes.

Dave
Same here. I do own some Irwin. They each have a use. I like the small pointy one for small holes. Smaller pilot hole. They are excellent for cutting holes in the stainless firewall. Fiberglass too. I always draw a black line in the unibit at the stop mark to keep from going too far.
__________________
Larry Larson
Estes Park, CO
E-mail: wirejock at yahoo dot com
Builder Blog: http://wirejockrv7a.blogspot.com
Donated 12/01/2021, plus a little extra.
RV-7A #73391, N511RV reserved
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
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 03:08 AM.


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.