Spot Weld Hole Size ?

• Oct 29, 2013

• #1

stanhope55

Well-Known Member

Local time

2:05 AM

Joined

Jul 25, 2009

Messages

132

Reaction score

3

Location

Atlantic Canada

What is the standard size hole ? I have a flange/punch tool and it is cutting 3/16 holes ? They seem very small to me ? This cant be the factory size ?

 

• Oct 29, 2013

• #2

clemul

Well-Known Member

Local time

3:05 AM

Joined

Nov 17, 2010

Messages

539

Reaction score

357

Location

new york

5/16 is the recommended size for most plug welds as per the amd floor pan installation DVD. My factory welds were approximately 5/16-3/8...

 

• Oct 29, 2013

• #3

D

dryheat

FBBO Gold Member

FBBO Gold Member

Local time

1:05 AM

Joined

Feb 4, 2011

Messages

921

Reaction score

632

Location

Glendale, AZ 85308

I'm using a 3/8 right now.

 

• Oct 29, 2013

• #4

5.7 hemi

FBBO Gold Member

FBBO Gold Member

Local time

2:05 AM

Joined

Dec 21, 2008

Messages

17,588

Reaction score

19,324

Location

TEXAS

3/8 is about right.

 

• Jan 5, 2014

• #5

H

hemi#1

Well-Known Member

Local time

2:05 AM

Joined

Oct 20, 2012

Messages

600

Reaction score

306

Location

pilot point tx

most auto paint stores and auto parts stores have a spot weld hole saw it has a spring loaded center and a 3/8s" hole saw made just for spot welds

 

• Jan 5, 2014

• #6

bigaadams

Well-Known Member

Local time

2:05 AM

Joined

Apr 4, 2013

Messages

506

Reaction score

184

Location

Mid Georgia

if you use the spring loaded center style spot weld cutter..which are great by the way, I do suggest that as a minimum you center punch the spot prior to use to help keep the bit centered..I found it best to simply use a starter bit and just drill me a locater, don not drill past the fist layer of metall..all you need is the pin locator...I have not broken a cutter since adapting this practice..

 

• Jan 5, 2014

• #7

Jeremiah

Well-Known Member

Local time

12:05 AM

Joined

Feb 7, 2012

Messages

1,425

Reaction score

589

Location

Rogue River, OR

bigaadams said:

if you use the spring loaded center style spot weld cutter..which are great by the way, I do suggest that as a minimum you center punch the spot prior to use to help keep the bit centered..I found it best to simply use a starter bit and just drill me a locater, don not drill past the fist layer of metall..all you need is the pin locator...I have not broken a cutter since adapting this practice..

Click to expand...

Excellent advice. I agree wholeheartedly.

 

• Jan 5, 2014

• #8

C

CDXXVII

Member

Local time

3:05 AM

Joined

Apr 15, 2011

Messages

21

Reaction score

0

Location

Vermont

stanhope55 said:

What is the standard size hole ? I have a flange/punch tool and it is cutting 3/16 holes ? They seem very small to me ? This cant be the factory size ?

Click to expand...

What you are talking about is called a plug weld. The factory used spot welds which do not require any holes.