Metric Press-Fit Drill Bushings
Also known as jig bushings, these metric drill bushings fit inside fixture plate holes to guide drill bits, counterbores, reamers, and other cutting tools. They improve accuracy so that your drilled holes and cuts are consistent from part to part. Known for their versatility, drill bushings are also used as spacers, shims, and machinery bushings. These bushings are made of hardened, ground steel that holds its shape and resists wear, so they last for many cycles without needing to be replaced.
All bushings have a chamfer on the outside that centers the bushing as you place it into the hole. Press into place with a manual or hydraulic press. They also have internal chamfers, so it's easier to insert bits, pins, and punches into the bushing. DIN 179 bushings meet dimensional and material standards that make sure they're compatible with other parts and tools. Although DIN 179 is no longer an active standard, it's still a common reference point for designers.
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Tolerance | Each | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
OD, mm | Lg., mm | Internal Chamfer | For Drill Bit Size | ID, mm | OD, mm | Lg., mm | Drill Bushing Type | Material | Hardness | Specifications Met | 1-5 | 6-11 | 12-Up | |
12.25 mm ID | ||||||||||||||
35 | 26 | One End | 12.25 mm | 0.016 to 0.034 | 0.017 to 0.033 | -0.2 to 0.2 | PM | Steel | Rockwell B61 | DIN 179 | 000000000 | 000000 | 000000 | 000000 |