Jayco RV Owners Forum
 


Reply
 
Thread Tools Display Modes
 
Old 04-07-2014, 09:45 PM   #1
Senior Member
 
Join Date: Aug 2011
Location: Missouri City, The Republic of Texas
Posts: 3,008
Question Drill bit for fiberglass

Planning to re-route breakaway wiring. This is a 5th with the switch mounted on the f-glass next to the pin box. I will drill a hole through the paneling. It's very thin (1/8" or less). What type of bitt will give the best (cleanest) hole? I plan a gradually increasing size up to about 1/2".
Grrrrrrrrr, posted in the wrong section. Figure the moderators will move it........
__________________

__________________
Cheers,
T_

2013 F-350 CC SB 2WD 6.7PS
2013 Eagle Premier 351 RLTS
-SOLD- 2012 X23B
-SOLD- 2003 Ford Expedition 5.4, Bilstein shocks
RedHorse1 is offline   Reply With Quote
Old 04-07-2014, 10:07 PM   #2
Junior Member
 
Join Date: Mar 2014
Location: pensacola
Posts: 29
a hole saw will give you the cleanest hole in fiberglass.
__________________

snapper388 is offline   Reply With Quote
Old 04-07-2014, 10:44 PM   #3
Senior Member
 
Tpratt83687's Avatar
 
Join Date: Aug 2013
Location: Idaho
Posts: 633
I've had very good luck with "brad point" bits. They're available at any woodworking store and at the big box hardware stores. They have a center point that keeps your hole right where you want it and the cutting starts out at the very edge of the bit, therefore it won't wander and you don't need to start with a small bit and work your way up to the 1/2" hole. Very clean cutting in wood, plastic, fiberglass, aluminum & brass. They WILL NOT work in ferris metals. The bits are too soft for steel or cast iron.
__________________
___________________
Tom
'14 Redhawk 29XK
Tpratt83687 is offline   Reply With Quote
Old 04-08-2014, 05:11 AM   #4
Senior Member
 
mcfarmall's Avatar
 
Join Date: Jun 2011
Location: Kalamazoo, West Michigan
Posts: 1,814
Quote:
Originally Posted by RedHorse1 View Post
snip....I plan a gradually increasing size up to about 1/2"...snip
Locate your hole where you won't hit any framing members or anything important behind it and use a 1/2" brad point bit or forstner bit and make your hole in one shot...don't step it up. Hole saws work well on the thin fiberglass skin and will cut through anything below it including ferrous and non-ferrous metals, wood, electrical wiring, pipe, you name it. You may have difficulty finding a 1/2" hole saw, they usually start around 3/4". By the time you add a standard 1/4" pilot bit there wouldn't be much room left for the hole saw itself.
__________________
2006 23B Hybrid with 10k round bar WDH
2011 F150 4x4 SCREW Ecoboost, Max Tow, Integrated TBC, 3.73 LS axle, Firestone Ride Rite airbags.
mcfarmall is offline   Reply With Quote
Old 04-08-2014, 09:46 AM   #5
Senior Member
 
Join Date: Aug 2011
Location: Missouri City, The Republic of Texas
Posts: 3,008
Thanks guys! I have a brad point bit but was afraid that it might cause chipping. I'll give it a spin.
__________________
Cheers,
T_

2013 F-350 CC SB 2WD 6.7PS
2013 Eagle Premier 351 RLTS
-SOLD- 2012 X23B
-SOLD- 2003 Ford Expedition 5.4, Bilstein shocks
RedHorse1 is offline   Reply With Quote
Old 04-08-2014, 05:24 PM   #6
Senior Member
 
tslarson's Avatar
 
Join Date: Apr 2011
Location: NW Wisconsin
Posts: 342
To reduce chipping of the gelcoat, cover the area where the hole will be drilled with masking tape first. Also if possible run the drill in reverse until it cuts though the gelcoat, especially when using a hole saw.
__________________

2015 Starcraft Travel Star 299BHU Black Pearl Edition
2011 Jayco X23J (traded in)
2009 Ford F150 FX4 SuperCrew
tslarson is offline   Reply With Quote
Old 04-08-2014, 07:16 PM   #7
Senior Member
 
Join Date: Jul 2011
Location: Ottawa Valley
Posts: 330
The Forstner bit would prevent the chipping. You could run the brad point slowly in reverse to start the hole. The centre point will keep the bit in position and it will score the fibreglass a apposed to chipping and then run it forward.
__________________
Married To The Navigator
2005 Red GMC Duramax 4X4 HD Crew Cab
2012 321RLTS
4" Magnaflow, Banks Air Intake
Firestone Ride Rite Air Springs
DMRGMC is offline   Reply With Quote
Old 04-11-2014, 08:44 AM   #8
Senior Member
 
Join Date: Aug 2011
Location: Missouri City, The Republic of Texas
Posts: 3,008
Thanks all! Used a spade bit (aka brad point). Actually got a new one, old one was dull. Couple layers of tape. Worked great!
__________________

__________________
Cheers,
T_

2013 F-350 CC SB 2WD 6.7PS
2013 Eagle Premier 351 RLTS
-SOLD- 2012 X23B
-SOLD- 2003 Ford Expedition 5.4, Bilstein shocks
RedHorse1 is offline   Reply With Quote
Reply

Thread Tools
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

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


» Virginia State Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -6. The time now is 08:26 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2002-2016 Social Knowledge, LLC All Rights Reserved.