SCARFING INSERT_SNMA 2509-R
Brand :
DORMER
Caution
Product Description
Dormer Pramet SNMA 250924-R00:T9335 is a negative, double-sided square scarfing insert with a straight (R00) cutting edge. It removes the external weld bead from welded square and rectangular tubes in steel, stainless steel and super alloys. It is made of T9335 MT-CVD coated, functionally graded WC-Co carbide.
T9335 grade characteristics
- Functionally gradient substrate with medium grain size and relatively high cobalt content.
- MT-CVD coating of medium thickness with a special surface finish.
- Very high strength. Designed for machining material groups P, M and S at medium cutting speeds.
- Suitable for continuous and heavily interrupted cuts, and withstands very unfavourable machining conditions.
Reading the code SNMA 250924-R00
- S: square insert shape
- N: 0° clearance angle (negative insert)
- M: tolerance class
- A: cylindrical fixing hole, no chipbreaker
- 25: cutting edge length 25.4 mm
- 09: insert thickness 9.52 mm
- 24: corner radius 2.4 mm
- R00: working (profile) radius 0, straight cutting edge
Usage notes
- Cooling has a positive effect on tool life and is recommended.
- This insert removes the weld bead from the outside of the tube. The inside weld bead is removed with scarfing rings.
The Dormer Pramet SNMA 2509-R scarfing insert is designed for external scarfing, which trims the weld bead left on the outside of tubes during welded tube production. The SNMA 250924-R00:T9335 version has a straight cutting edge with no profile radius, so it suits the flat faces of square and rectangular tubes.
Key features
- Square negative insert with 0° clearance and a flat top without chipbreaker. The double-sided design provides 8 cutting edges.
- Main cutting edge length of 25.4 mm, thickness of 9.52 mm and a central cylindrical fixing hole.
- T9335 grade with a functionally graded WC-Co substrate of medium grain size and relatively high cobalt content, giving very high strength.
- Medium-thickness MT-CVD coating with a special surface finish. The tough coated carbide withstands the extreme heat of the scarfing process.
- The cutting edge geometry delivers excellent tube surface quality and long tool life.
Applications
- External weld bead removal on welded square and rectangular tubes.
- Workpiece materials: steel (ISO P), stainless steel (ISO M) and super alloys (ISO S).
- Continuous and heavily interrupted cuts at medium cutting speeds, including very unfavourable machining conditions.
| Manufacturer | Dormer Pramet |
|---|---|
| Product type | External scarfing insert |
| Series | SNMA 2509-R |
| ISO code | SNMA 250924-R00:T9335 |
| EDP number | 6801267 |
| Insert shape | S - square (90°) |
| Clearance angle | N - 0° (negative) |
| Insert design | Double-sided, flat top, no chipbreaker, with fixing hole |
| Number of cutting edges | 8 |
| Cutting edge profile | R00 - straight edge, no profile radius |
| Cutting edge length (L) | 25.4 mm (1 inch) |
| Inscribed circle (IC) | 25.4 mm |
| Thickness (S) | 9.52 mm (0.375 inch) |
| Fixing hole diameter (D1) | 9.12 mm |
| Corner radius (RE) | 2.4 mm |
| Grade | T9335 |
| Substrate | Functionally graded WC-Co carbide |
| Coating | MT-CVD (black) |
| ISO application range | P20-P45 / M15-M40 / S15-S25 |
| Workpiece materials | Steel, stainless steel, super alloys |
| Country of origin | Czech Republic |
| ISO code | EDP No. | L (mm) | IC (mm) | S (mm) | D1 (mm) | RE (mm) | Profile radius (mm) | Grade | Application |
|---|---|---|---|---|---|---|---|---|---|
| SNMA 250924-R00:T9335 | 6801267 | 25.4 | 25.4 | 9.52 | 9.12 | 2.4 | 0 | T9335 | Square and rectangular tubes |
Square negative insert with 90° corners and 0° clearance on all sides. Both faces are flat with no chipbreaker, so the insert can be turned over and indexed to use all 8 cutting edges. A cylindrical fixing hole passes through the centre.
- Cutting edge length L: 25.4 mm (equal to inscribed circle IC 25.4 mm)
- Thickness S: 9.52 mm
- Fixing hole diameter D1: 9.12 mm
- Corner radius RE: 2.4 mm
- Cutting edge profile: R00, straight edge with no profile radius
How to choose the right scarfing insert
- Tube profile: the number after R in a Dormer Pramet scarfing insert code is the working radius in mm. R00 has a straight cutting edge for the flat faces of square and rectangular tubes. Round tubes need an insert whose working radius matches the tube outside diameter.
- Top form: SNMA inserts have a flat top, while SNMX inserts have a concave top.
- Workpiece material: T9335 covers steel (P20-P45), stainless steel (M15-M40) and super alloys (S15-S25).
- Cutting conditions: the tough T9335 substrate, with its relatively high cobalt content, suits continuous and heavily interrupted cuts. Use coolant to extend tool life.
- Inside weld bead: for the inside of the tube, use Dormer Pramet PSR scarfing rings instead of an insert.