Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Attention Forum Users: On the 28th of December 2023 at 9:00am Central Time, we will be taking the forums down for maintenance while we prepare the new forums for your use. Please click here for more information.

Tool Talk Discussion Forum

Left hand drill bits

Welcome Guest, Log in or Register
Author 
PAGlenn

10-12-2007 15:13:27




Report to Moderator

I was looking through a Harbor Freight Tools catalog and noticed the left hand drill bit set.
Are they used for work that a right hand bit can't perform?




[Log in to Reply]   [No Email]
moseed

10-15-2007 07:14:54




Report to Moderator
 Re: Left hand drill bits in reply to PAGlenn, 10-12-2007 15:13:27  
They work well as extractors if you start small and increase bit size as you go. If you can get three graduations or more (hard to do with small studs/bolts) you increase your odds of success tremendously. Also go very slowly. Your bad luck will get worse if you snap one off. Use name brand bits. Harbor Freight serves a purpose but this is not one of those situations.



[Log in to Reply]  [No Email]
XRogerX

10-12-2007 18:09:10




Report to Moderator
 Re: Left hand drill bits in reply to PAGlenn, 10-12-2007 15:13:27  
For most of us, the left hand drill bit is most useful as a bolt extractor, as was stated. However, left hand drill bits originally were designed for use in high production applications, where many spindles were geared together in a gear train to produce a specific part quickly. It was often easier to produce a drill bit for a spindle turning "the wrong way" than to include an idler gear in the machine to get the spindle turning "the right way".

[Log in to Reply]  [No Email]
CWL

10-13-2007 08:52:17




Report to Moderator
 Re: Left hand drill bits in reply to XRogerX, 10-12-2007 18:09:10  
Yep. They're commonly called screw machines. Last place I worked had a whole production line of them. They make a manufacture a lot of money when they are set up right!



[Log in to Reply]  [No Email]
Phil9N3667

10-12-2007 18:07:41




Report to Moderator
 Re: Left hand drill bits in reply to PAGlenn, 10-12-2007 15:13:27  
Left hand bits are wonderful if the bolt/stud isn"t tight and will back on out! In my line of work as a mechanic at a Mack truck service dealership years ago, I ran up with a spot where a L.H. bit wouldn"t work! The old Mack transmissions had a clutch brake mounted on the bottom countershaft and it was locked in place with a 1/2" fine L.H. bolt. Talk about confusing to get out if you weren"t thinking sraight that day! Ya don"t use L.H. bits much but when needed they"re worth their weight in gold. If push came to shove I have taken a regular bit, put it on the bench grinder and converted it to L.H. You don"t drill very deep but it will work. Have a good weekend folks.

[Log in to Reply]  [No Email]
Jim in Ma.

10-12-2007 16:13:27




Report to Moderator
 Re: Left hand drill bits in reply to PAGlenn, 10-12-2007 15:13:27  
I got a set from Northern - they come in very handy



[Log in to Reply]  [No Email]
jjamna

10-12-2007 15:38:18




Report to Moderator
 Re: Left hand drill bits in reply to PAGlenn, 10-12-2007 15:13:27  
What is the part #? I would like to get a set myself. Great for getting broken bolts out.



[Log in to Reply]  [No Email]
Bob

10-12-2007 15:15:51




Report to Moderator
 Re: Left hand drill bits in reply to PAGlenn, 10-12-2007 15:13:27  
One use is removing a broken off stud or bolt that is NOT stuck in position. When you drill it out with the LH bit, hopefully, the bit "catches", and the broken part screws out.



[Log in to Reply]  [No Email]
PAGlenn

10-12-2007 19:07:01




Report to Moderator
 Re: Left hand drill bits in reply to Bob, 10-12-2007 15:15:51  
Thanx all for the comments. Adding a set to my list. They are offering a 13 piece set for $6.86
and a 4 piece set for $2.99. From DrillMaster. Lot No. 95146 and 38180. My paper says the sale is until Oct.29.



[Log in to Reply]  [No Email]
335LP

10-15-2007 06:40:56




Report to Moderator
 Re: Left hand drill bits in reply to PAGlenn, 10-12-2007 19:07:01  
Not going to get quality for that price. Hanson made some extractor sets with LH bit right size to use with EZ outs in set. I broke a few LH bits in set and replaced them with better quality Lawson or LH bits from MSC, mscdirect.com or mcmaster.com Just like any drill bit get what you pay for.



[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy