A spiral screw extractor is itself a coarse-pitched tapered screw thread. They are left-handed, for use on right-handed threads. These screw extractors are high quality by milled technological process and with the sand-blasted surface.
6PCS screw extractor set from GSR includes standard 5 screw extractors No.1-5 which can be used for screw sizes 1/8"-3/4"(M 3-18), and one tap wrench which can clamp all screw extractors by jaws clamping range is fit to square sizes exactly for all sizes. You can handle the extracting fitting easily by hand.
The additional assistant handle has big enough clamping range for all sizes from this set ,and it enhances the stubborn screws removing much simpler and faster.
Milled spiral flutes design enhances grip as resistance increases.GSR screw extractors designed with a reinforce shank which increase their torque to resist the impact during broken bolt or screws removal.
Operation Procedure:
1. The screw is first drilled out to the proper diameter for that extractor.
2. Then the screw extractor is inserted into the hole and turned in the opposite direction, usually using a tap wrench.
3. As the extractor is turned, the flutes on the tool dig into the screw, causing it to lock tightly and withstand the applied torque required to remove the screw.
4. Turn it till the screw is extracted out.
With right steps, all GSR screw extractors are suitable for various types of screws and bolts.
SPECIFICATION
No.1 1/8-1/4", M 3-6 (use drill bit 5/64 or 1.8 mm)
No.2 1/4-5/16", M 6-8 (use drill bit 1/8" or 3.2 mm)
No.3 5/16-7/16", M 8-11 (use drill bit 11/64" or 4.5 mm)
No.4 7/16-9/16", M 11-14 (use drill bit 1/4" or 6.5 mm)
No.5 9/16-3/4", M 14-18 (use drill bit 21/64" or 8.5 mm)
Technical Details
Manufacturer : HANGZHOU GSR THREADS TOOLS CO LTD
Item Weight: 8.8 ounces
Product Dimensions: 4.65 x 5 x 1 inches
Item model number: SC TYPE B
Material: 42CrMo
Power Source: hand_powered
Item Package Quantity 1
Included Components: 5pcs Screw extractors and 1pc tap wrench
Batteries Required: No
