Type R Counterbores
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Fuller Type R Counterbores have two flutes to cut a flat bottom hole in wood or plastics for heads of screws, rivets, or nails. Extension lip pattern cutting edges cuts a clean hole without tearing the wood. These stainless steel bores are hardened enough to hold an edge and yet can be sharpened with a file.
| Part Number | Cutting Diameter | Drill Size |
|---|---|---|
| R17 | 3/8 | 7/64 |
| R1 | 3/8 | 1/8 |
| R19 | 3/8 | 9/64 |
| R15 | 3/8 | 5/32 |
| R111 | 3/8 | 11/64 |
| R13 | 3/8 | 3/16 |
| R113 | 3/8 | 13/64 |
| R72 | 7/16 | 1/8 |
| R75 | 7/16 | 5/32 |
| R73 | 7/16 | 3/16 |
| R713 | 7/16 | 13/64 |
| R22 | 1/2 | 1/8 |
| R25 | 1/2 | 5/32 |
| R211 | 1/2 | 11/64 |
| R23 | 1/2 | 3/16 |
| R213 | 1/2 | 13/64 |
| R27 | 1/2 | 7/32 |
| R215 | 1/2 | 15/64 |
| R24 | 1/2 | 1/4 |
| R93 | 9/16 | 7/32 |
| R97 | 9/16 | 7/32 |
| R94 | 9/16 | 1/4 |
Reviews for Type R Counterbores
October 7, 2009
As a church we are setting up so that people can build their own interior storm windows, double-glazed with heat-shrink plastic. As of yet, have not found an acceptable counterbore for the pine we are using for frame stock. What is needed is a counterbore that cuts like a forstner bit so that the wood has a place to go, it just loads up in these, and then you have to go at it several times with the drill press. I think these are as good as they can be, of this design.
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