To extract the broken screw, it is best to start off with a flat surface by sawing or grinding any jagged ends so that a hole is drilled in the centre of the screw, stud or bolt. Drill the hole depth as in the table below.
| Extractor # | Screw/Bolt | Drill Size |
Minimum Depth |
|---|---|---|---|
| #1 | 1/8 in. – 1/4 in. | 5/64 in. | 7/64 in. |
| #2 | 1/4 in. – 5/16 in. | 7/64 in. | 1/8 in. |
| #3 | 5/16 in. – 7/16 in. | 5/32 in. | 13/64 in. |
| #4 | 7/16 in. – 9/16 in. | 7/32 in. | 7/32 in. |
| #5 | 9/16 in. – 3/4 in. | 9/32 in. | 1/4 in. |
Insert square end of extractor into tap wrench, turn counter-clockwise while applying a downward pressure. To avoid the risk of breakage it is most important to keep extractor square to the workpiece during this procedure. The extractor should lock into the screw and with more counter-clockwise pressure, remove the broken bolt or screw.
| BRAND | Schroder |
|---|---|
| QUANTITY | Package / Set |
| SKU | BSM-4615 |
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