Filters
A round file opens and trues a hole rather than a surface, and its diameter has to be under the bore being worked. A file at size binds against both sides at once and cuts nothing; a file well under size cuts a flat rather than following the curve. Reading the bore before the file rather than the other way round is what makes this straightforward.
That makes diameter the first figure rather than length, which is the reverse of how a flat or hand file is chosen. The file is picked against the hole and then the length is chosen against how deep the hole runs. Diameter is stated per file so the fit in the bore is known before it is tried.
Cut grade runs bastard, second and smooth across the sizes here, at 12 x 150mm, 12 x 200mm and 12 x 250mm with smooth cut held at the two shorter lengths. Grade is chosen as on any file: how much has to come off before finish matters.
A round file is worked with a turning motion as well as a stroke, which is what keeps the bore round rather than developing flats. A file used in one plane only will open the hole into an oval. Files are sold on the tang. Send the bore size to 07754288583 on WhatsApp. A file used only on the push stroke also lasts longer, since the teeth cut in one direction.
| Model No | AK5802 |
|---|---|
| Brand | Premier |
| Contents | 150mm Round File |
| Nett Weight | 0.00kg |
| Model No | AK5862 |
|---|---|
| Brand | Premier |
| Contents | 200mm Smooth Cut Round File |
| Model No | AK5732 |
|---|---|
| Brand | Premier |
| Contents | 200mm Round File |
| Nett Weight | 0.00kg |
| Product Dimensions (L x W x H) | 200 x 15 x 15 mm |
|---|---|
| Product Weight | 0.4 Kg |
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