Jump to content

Nominations for Tractor of the Month
Garden Tractors and Parts on eBay



Photo
- - - - -

Step Drill Bit Question- Metal Thickness


  • Please log in to reply
14 replies to this topic

#1 Ryan313 OFFLINE  

Ryan313

    PK Fanatic

  • Super Moderator
  • Staff
  • -GTt Supporter-
  • Contributor
  • Member No: 7087
  • 3,239 Thanks
  • 5,159 posts
  • Location: Wallkill, NY

Posted July 23, 2013 - 12:51 PM

I need to drill a hole that is 1 1/8" in the new frame for my PK dump tractor (HERE) to put the front axle pivot pin through. The problem is that a drill bit that large will cost me at least $35! I found some step drill bits on eBay for less then half that, I would rather purchase a step drill bit since it is cheaper, and I would be able to use it more then a huge 1 1/8" bit after this one hole.

 

The thing I am unsure of about the step bit is, can I drill something thicker then how tall each step is? For example, if the step is 1/8" can I drill through something that is 1/4" thick? Obviously I can't if I want the hole to be the size of one of the middle steps, but if I want the hole to be the size of the largest step, can I just go right through? It would make sense to me that it would work, but I want to make sure before I buy it and it does not work.


  • JRJ said thank you

#2 JDBrian OFFLINE  

JDBrian

    Super Moderator

  • Super Moderator
  • Staff
  • -GTt Supporter-
  • Contributor
  • Member No: 2507
  • 9,574 Thanks
  • 14,136 posts
  • Location: Hubley, Nova Scotia - Canada

Posted July 23, 2013 - 12:57 PM

I've never used a step bit. I use holesaws to drill large holes in metal and they will do the job if you get a good bi metallic one. The problem with holesaws is that the hole is always a bit larger than the nominal size. So if you are looking for a precision fit it may not be a good choice. A 1" will likely be slightly smaller than 1 1/8 and a 1 1/8 will be a bit larger.



#3 chaentjens OFFLINE  

chaentjens
  • Senior Member
  • Member No: 10983
  • 100 Thanks
  • 122 posts
  • Location: CT moodus

Posted July 23, 2013 - 01:25 PM

Yes it will work. Use plenty of cutting oil on sliw speed. You will have to go in from both sides to fully drill a hole that thick!

Sent from my SPH-L900 using Tapatalk 4 Beta



#4 JRJ OFFLINE  

JRJ
  • Senior Member
  • Member No: 16399
  • 876 Thanks
  • 1,170 posts
  • Location: N.W. Arkansas

Posted July 23, 2013 - 01:26 PM

Ryan I had used a step drill once and really liked it, I bought the one that goes up 1/2" and it was about $13.00 at Lowes.

 

 

Dick



#5 IamSherwood OFFLINE  

IamSherwood

    Elf guardian

  • Senior Member
  • -GTt Supporter-
  • Contributor
  • Member No: 2066
  • 8,379 Thanks
  • 7,696 posts
  • Location: Northern Ontario

Posted July 23, 2013 - 01:38 PM

Yes Ryan, I agree, it'll work.

Step drills are great to have around. Especially for sheet metal.



#6 WNYTractorTinkerer ONLINE  

WNYTractorTinkerer

    Tinker Master

  • Senior Member
  • -GTt Supporter-
  • Member No: 10789
  • 8,310 Thanks
  • 4,660 posts
  • Location: Avon, NY

Posted July 23, 2013 - 02:08 PM

Yes Ryan, I agree, it'll work.

Step drills are great to have around. Especially for sheet metal.

I have a few sets of them and they are great for drilling any large hole in almost any metal!  The nice thing about them is that you don't have to stop and install the next size drill in your chuck to continue the job!..  There are step drills available with different size or deep 'steps' but they are a bit more $$$..  It's still a heckuva lot cheaper than buying an assortment of all of the drills that they will replace.   Bore away! :rocker2:


  • HDWildBill said thank you

#7 marlboro180 OFFLINE  

marlboro180
  • Senior Member
  • Member No: 10710
  • 634 Thanks
  • 954 posts
  • Location: SE WI

Posted July 23, 2013 - 04:00 PM

Yes Ryan, it sure will work.  I've used them plenty of times for punching out bigger holes in heavier steel plate. The other advantage of having a step bit is for when one has to make a hole in something thin . A regular twist bit has a tendancy to grab and twist right at the bottom of the hole ( I have one  broken drill shaft from just that.... using big regular  bit  :mad2: )   IMHO The step bit is sure better for the thin metals as it grabs less. 


Edited by marlboro180, July 23, 2013 - 04:01 PM.


#8 MH81 ONLINE  

MH81

    Proud to be Deplorable

  • Staff Admin
  • Staff
  • -GTt Supporter-
  • Contributor
  • Member No: 802
  • 27,271 Thanks
  • 28,609 posts
  • Location: N. W. PA

Posted July 23, 2013 - 04:26 PM

Slow and good oil. The step bt seems to get hot faster, but I find myself reaching for them all the time. Very convenient
  • IamSherwood said thank you

#9 JDBrian OFFLINE  

JDBrian

    Super Moderator

  • Super Moderator
  • Staff
  • -GTt Supporter-
  • Contributor
  • Member No: 2507
  • 9,574 Thanks
  • 14,136 posts
  • Location: Hubley, Nova Scotia - Canada

Posted July 23, 2013 - 04:36 PM

It must take quite a while to punch a large hole in 1/4" plate with one of those. You are drilling away all the metal. With a hole saw you are just cutting a narrow bit around the circumference of the hole and a 1/4" hole in the centre. 



#10 John@Reliable OFFLINE  

John@Reliable

    Procrastinators unite tomorrow

  • Senior Member
  • -GTt Supporter-
  • Contributor
  • Member No: 36
  • 1,295 Thanks
  • 1,416 posts
  • Location: Boston- Cape Cod MA

Posted July 23, 2013 - 05:14 PM

Will it work >>> maybe I say.

As always it really depends on the tool, I wear out good 50 buck 3/4" step drills every few months working in sheet metal.



#11 TomLGT195 OFFLINE  

TomLGT195
  • Senior Member
  • -GTt Supporter-
  • Member No: 29432
  • 2,798 Thanks
  • 2,197 posts
  • Location: Southern New Hampshire

Posted July 23, 2013 - 06:56 PM

Yes it will work. Use plenty of cutting oil on sliw speed. You will have to go in from both sides to fully drill a hole that thick!

Sent from my SPH-L900 using Tapatalk 4 Beta

:ditto:  I have used for 1/4" before   just go slow and  clamp piece, flip and do again. you will find a lot of uses for the step drill once you have it.



#12 JD DANNELS OFFLINE  

JD DANNELS

    Tractorholic

  • Senior Member
  • Member No: 2011
  • 3,786 Thanks
  • 3,907 posts
  • Location: Newton.Ia

Posted July 23, 2013 - 06:58 PM

I have never used step drills, but would like to give them a try. But I have to agree with Brian an arbor and a set of good hole saws would be a lot cheaper. I like the ones I have.

#13 Gary400 OFFLINE  

Gary400

    JD,junkie

  • Senior Member
  • Contributor
  • Member No: 2316
  • 225 Thanks
  • 768 posts
  • Location: North East Missouri

Posted July 23, 2013 - 08:03 PM

they work good in sheet metal not so good in iron .



#14 ghack OFFLINE  

ghack
  • Member
  • Member No: 36839
  • 29 Thanks
  • 35 posts

Posted July 23, 2013 - 08:23 PM

they can be sharpened also as with most good tools.



#15 Alc ONLINE  

Alc

    Tractorholic

  • Senior Member
  • -GTt Supporter-
  • Contributor
  • Member No: 1094
  • 5,449 Thanks
  • 6,616 posts
  • Location: Bangor Pa

Posted July 23, 2013 - 09:14 PM

Not to get too far off topic but the fellow who lowered the front axle on my 2418 just cut the hole with a torch and welded it in place




Top