SCARFING INSERT_SNMA 1506-R

Grade 6640

• WC-Co carbide substrate without cubic carbides
• Thin MT-CVD coating with a TiCN supporting layer
• ISO application range P20-P40 (steel) and M20-M35 (stainless steel)
• Intended for semi-roughing and roughing at lower to medium cutting speeds
• Suitable for interrupted cuts and unfavourable machining conditions

Usage guidance

• Choose the insert by tube outside diameter: SNMA 150608-R09 is intended for tubes of 13-16 mm.
• Use a scarfing tool holder that accepts SNMA 1506 inserts and clamp the insert securely. Stable clamping prevents insert vibration and helps achieve a clean scarfed surface.
• Index to a new cutting edge when wear or chipping appears. The double-sided design provides 8 cutting edges.
• Carbide edges are sharp and scarfing chips are hot. Wear gloves and eye protection when handling inserts and chips.

The DORMER PRAMET SNMA 1506-R series consists of double-sided, negative scarfing inserts for external scarfing, the removal of the weld bead (weld deposit) from the outside of welded tubes and pipes during tube production. The square insert has a flat top face and 8 cutting edges, and each cutting edge is ground to a working radius that follows the tube contour.

SNMA 150608-R09:6640 has a working radius of 9 mm and covers tubes with an outside diameter of 13-16 mm. It is made in grade 6640, an MT-CVD coated WC-Co carbide within ISO ranges P20-P40 and M20-M35, for scarfing steel and stainless-steel tubes.

Key features

• Double-sided negative design with 8 cutting edges per insert
• Flat top face (SNMA 1506-R insert design)
• 9 mm working radius matched to tube outside diameters of 13-16 mm
• Precise cutting edge for a high-quality surface on the scarfed weld area
• Tough coated carbide grade with excellent resistance to heat and chipping for long edge life

Applications

External weld scarfing on tube and pipe mills producing welded steel and stainless-steel tubes.

Square (S-shape) negative insert with 0° clearance, flat top and bottom faces and a central fixing hole. The insert is double-sided with 4 cutting edges on each face, 8 in total. Each main cutting edge is ground to the working radius PFRAD so that it follows the outside contour of the tube.

• L - cutting edge length: 15.875 mm
• IC - inscribed circle diameter: 15.875 mm
• S - insert thickness: 6.35 mm
• D1 - fixing hole diameter: 5.16 mm
• PFRAD - working radius: 9 mm

How to choose a scarfing insert

• Tube outside diameter: pick the working radius (PFRAD) whose tube diameter range covers the tube being produced. SNMA 150608-R09 covers 13-16 mm.
• Insert top form: SNMA 1506-R has a flat top face, while the SNMX 1507-R series has a concave top face. Both are double-sided negative inserts with 8 cutting edges.
• Workpiece material: grade 6640 is intended for steel and stainless-steel tubes.

SNMA 1506-R range: working radius and tube outside diameter

Values are taken from the manufacturer's scarfing catalogue. Availability of individual radii may vary.