Carbide Outside Scarfing Inserts | 4 6 8 Edge

What is an Outside Scarfing Insert?

The outside scarfing insert is a tungsten carbide cutting insert mounted on the OD scarfing tool holder. As the welded tube passes through the scarfing unit, the insert continuously cuts away the excess weld bead without damaging the pipe surface.

Its main advantages include:

• Smooth external weld bead removal

• High wear resistance for continuous production

• Easy indexing when one cutting edge becomes worn

• Suitable for carbon steel, galvanized and stainless steel tubes

Position in the production line

The outside scarfing unit is installed after the HF welder and squeeze rolls, where the weld bead is still hot and easier to remove efficiently.

The biggest difference is the number of usable cutting edges. More edges mean longer service life and fewer insert changes.

For most customers, the choice depends on production volume rather than pipe size. High-output factories usually prefer 6-edge or 8-edge inserts because they reduce machine stoppages.

Instead of selecting by appearance alone, engineers normally evaluate the following factors.

1. Current Insert Model

This is the fastest and most accurate method.

Examples include:

• SPUB

• SNMX

• ROMX

• Other customized models

If you already have a model number, we can usually supply a compatible replacement directly.

2. Tube Diameter & Wall Thickness

The weld bead size changes with different tube specifications, so the insert geometry and carbide grade should match the production range.

3. Pipe Material

Please let us know what material you produce most often:

• HR Steel

• CR Steel

• Galvanized Steel (GI)

• Stainless Steel

Different materials have different wear characteristics and affect insert life.

4. Production Speed

If your tube mill operates continuously at high speed, longer-life inserts are usually more cost-effective than frequently replacing standard ones.

Information Needed for Quotation

To recommend the correct outside scarfing insert, please provide as much information as possible.

Don't know the model? No problem. Simply send the drawing or clear photos of your existing insert, and our engineers can identify the correct replacement.

AIS Machinery supplies 4-edge, 6-edge and 8-edge tungsten carbide Outside Scarfing Inserts for ERW tube mills. We provide both standard replacement inserts and customized manufacturing according to customer drawings or samples, helping customers achieve stable weld bead removal and longer tooling life.

FAQ

●Can you manufacture according to our drawing?

Yes. Custom production based on drawings, dimensions or physical samples is available.

●Which insert lasts longer: 4, 6 or 8 edge?

Generally, 8-edge inserts offer the highest edge utilization, while 6-edge provides an excellent balance between cost and service life.

●What is the quickest way to get an accurate quotation?

Send your current insert model together with the tube diameter, wall thickness and a drawing or photo of the insert.