SCARFING INSERT_SNMX 15-R
Caution
Product Description
Double-sided negative scarfing insert from Dormer Pramet with a flat (R00) cutting edge and a 15.875 mm square body, made in T9335 MT-CVD coated carbide. Designed for removing the external weld bead from square and rectangular steel, stainless-steel and super-alloy tubes in tube mills.
About scarfing
Scarfing is the removal of the weld bead that forms along the seam when steel strip is shaped and welded into a tube. The insert is mounted in a scarfing holder on the tube mill and cuts the bead flush with the tube surface while the tube moves continuously through the line.
T9335 grade characteristics
- Functionally graded substrate with medium grain size and relatively high cobalt content
- MT-CVD coating of medium thickness with a special surface finish
- Very high strength; suited to medium cutting speeds
- Handles continuous and heavily interrupted cuts, and very unfavourable machining conditions
- For material groups P (steel), M (stainless steel) and S (super-alloys)
Usage notes
- The R00 profile is for flat tube faces. For round tubes, select an SNMX 15-R insert whose profile radius matches the tube outside diameter.
- Use coolant where possible; it has a positive effect on tool life.
- Clamp the insert in a holder designed for SNMX 15-R inserts and make sure the insert seat is clean before indexing to the next cutting edge.
- Normally supplied in packs of 10 pieces.
The SNMX 15-R series from Dormer Pramet is a range of negative, double-sided scarfing inserts used on tube and pipe mills to cut away the external weld bead that forms when steel strip is shaped and welded into a tube. The SNMX 15-R00:T9335 is the flat-profile version of the series (profile radius R00), intended for the flat sides of square and rectangular tubes rather than round tubes.
Key features
- Square 90° negative insert with 0° clearance, usable on both faces for 8 cutting edges per insert
- Main cutting edge length 15.875 mm (0.625 inch) and thickness 8.15 mm (0.321 inch)
- Flat R00 cutting edge profile for square and rectangular tube sections
- T9335 grade: functionally graded WC-Co carbide substrate with an MT-CVD coating of medium thickness
- Very high edge strength for continuous and heavily interrupted cuts, and for unfavourable machining conditions
- Covers ISO application ranges P20-P45, M15-M40 and S15-S25
Applications
- External weld bead removal (OD scarfing) on welded square and rectangular tubes
- Steel, stainless-steel and super-alloy tube production
- Use in lever-lock scarfing holders for SNMX 15-R inserts, such as PXFNR 2525 R 15
| Item | Specification |
|---|---|
| Product type | Negative double-sided scarfing insert |
| Brand | Dormer Pramet |
| Insert designation | SNMX 15-R |
| Insert shape | S - square, 90° |
| Clearance angle | N - 0° |
| Cutting edge length (L) | 15.875 mm (0.625 inch) |
| Inscribed circle (IC) | 15.875 mm (0.625 inch) |
| Insert thickness (S) | 8.15 mm (0.321 inch) |
| Fixing hole diameter (D1) | 5.16 mm |
| Profile radius | R00 (flat cutting edge) |
| Chipbreaker | With chipbreaker (no designation) |
| Grade | T9335 |
| Substrate / coating | Functionally graded WC-Co carbide / MT-CVD |
| ISO application range | P20-P45, M15-M40, S15-S25 |
| Workpiece | Square and rectangular tubes |
| Coolant | Recommended (positive effect on tool life) |
| Product code | EDP No. | Grade | L (mm) | IC (mm) | S (mm) | D1 (mm) | Profile radius | Tube type |
|---|---|---|---|---|---|---|---|---|
| SNMX 15-R00:T9335 | 6801215 | T9335 | 15.875 | 15.875 | 8.15 | 5.16 | R00 (flat) | Square / rectangular |
Square (S) insert with 90° corners and a 0° clearance (N) on all sides, so both the top and bottom faces can be used.
- Main cutting edge length L: 15.875 mm, equal to the inscribed circle IC 15.875 mm
- Insert thickness S: 8.15 mm
- Central through hole for clamping, diameter D1: 5.16 mm
- Cutting edge profile: straight, with no concave radius (R00), to follow the flat faces of square and rectangular tubes
- Chipbreaker geometry on both faces
Choosing the right scarfing insert
- By tube shape: R00 (flat cutting edge) for square and rectangular tubes; radius versions (for example R11, R18, R25, R35, R40) for round tubes, chosen to match the tube outside diameter.
- By insert size: SNMX 15 (15.875 mm edge), SNMX 19 (19.05 mm edge) and SNMX 25 (25.4 mm edge) are available; larger inserts cover larger tube diameters.
- By workpiece material: T9335 (P20-P45, M15-M40, S15-S25) covers steel, stainless steel and super-alloys; grade 6640 (P20-P40, M20-M35) is offered for steel and stainless steel.
- By clearance: negative SNMX inserts are double-sided, giving more cutting edges; Pramet also offers positive SPUB inserts with 11° clearance.