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Screw Extractor


1-4 products from 4

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GSR professional thread-repair kit 5-pcs screw-extractor left-hand-extractor CV-steel 00902000

screw extractor set 5 pcs. No. 1-5

9,99

incl. VA, excl. shipping costs

screw extractor set 5 pcs. No. 1-5

9,99 Zolltarifnummer: 82054000000
GSR professional thread-repair kit 6-pcs screw-extractor left-hand-extractor CV-steel 00902020 SALE

screw extractor set 6 pcs. No. 1-6

12,99

incl. VA, excl. shipping costs

GSR professional thread-repair kit 6-pcs screw-extractor left-hand-extractor CV-steel 00902020 HOT
8 piece screw extractor set left hand extractor cassette for sizes M3-M45 00902040

screw extractor set 8 pcs. no. 1 - 8

29,99

incl. VA, excl. shipping costs

GSR screw extractor set left extractor set 5 pieces metric M3-M18 00710010 SALE

GSR 5 pcs. Screw Extractor Set M3 - M18 No. 1 - 5

10,50

incl. VA, excl. shipping costs

GSR screw extractor set left extractor set 5 pieces metric M3-M18 00710010 HOT

GSR 5 pcs. Screw Extractor Set M3 - M18 No. 1 - 5

10,50 
packaging unit: 5 pcs, carton: 100 pcs

Screw extractor task

How do I get a broken screw out again? Our recommendation: please use a left-hand screw extractor. The left-hand extractor, also called screw extractor, is used when the screw head is defective and the original extracting tool (screwdriver, Allen key) no longer grips and can therefore no longer be used.

Construction of a screw extractor

The screw extractor has a square according to DIN 10, a cylindrical shaft and a rolled tapered extracting part (precision taper thread), which can be shaped differently depending on the extracting type. In any case, this taper thread has a left-hand twist. The tool is hardened. The square is used for holding in an adjustable tap wrench or a tool holder.

Instructions for the use of a screw extractor

How does a left-hand screw extractor work? The basic idea is as follows: A small hole is drilled into the screw to be loosened so that the precision taper thread can grip there. However, the hole must not be set at an angle or even predrilled too large. The thread of the screw can then be spread. This will considerably worsen the initial situation. Therefore, observe the information in the following table exactly and do not drill too large or too deep. 

One more tip on the use of the left-hand boring tool:

Often the heads of the screw are torn out because the screw has "seized" or rusted. Our tip in this case: penetrating oil. This so-called penetrating oil infiltrates rust layers and dirt. The oil can thus help to loosen rusted screws and thus facilitate unscrewing to prevent the screw extractor from breaking off. 

It's best to buy a screw extractor set. That you are well equipped for all incidents.

How do I use screw extractors on rusted screws?

In this graphic, we explain step-by-step how to use a screw extractor to remove a rusted screw without destroying the thread:
 
(1) First, a hole is drilled in the center of the screw after properly center punching the center. (2) Then the screw extractor is screwed counterclockwise (counterclockwise) into the drilled hole. An adjustable tap wrench can be used for unscrewing.
 
How to use a Screw Extractor Set

Which screw extractor should I use?

 
Overview table of screw extractors: So that you can find the right size and the right adjustable tap wrench. By the way, here you can go to our GSR Silver adjustable tap wrench program. 
 
Find the right metal twist drill in the category twist drills. We recommend PowerSpike twist drills with a special gating flute to save center punching.
 
 
Extractor Suitable for Suitable for twist drill tap
Size screwa threads Ø (mm) wrench
Nr. 1 M3 - M6 W 1/8 - 1/4 1,8 - 2,5 Nr. 1
Nr. 2 M6 - M8 W 1/4 - 5/16 3,0 - 3,2 Nr. 1
Nr. 3 M8 - M11 W 5/16 - 7/16 4,5 Nr. 2
Nr. 4 M11 - M14 W 7/16 - 9/16 6,0 - 6,5 Nr. 2
Nr. 5 M14 - M18 W 9/16 - 3/4 8.0 - 8,5 Nr. 3
Nr. 6 M18 - M24 W 3/4 - 1" 12,0 Nr. 4
Nr. 7 M24 - M33 W 1 - 1.3/8 15,0 Nr. 5
Nr. 8 M33 - M45 W 1.3/8 - 1.3/4 20,0 Nr. 6
 
 

Video Tutorial: Screw extractor - The correct use

 
 
 
More interesting articles on the subject of defective bolts, screw extractors and especially on threads for wheel studs can be found in our blog post: Thread wheel studs and wheel bolts.
 
 
You find the original manual thread repair free of charge to the Download on our homepage under: GSR Thread Repair Manual