Product Information
Helical milling is a hole-making machining process in which the cutter proceeds a helical path while rotating around its own axis, used to produce helical parts like helical gears, spiral flute milling cutters, twist drills, and helical cam grooves.
SPMT for helical milling.
S – Square shape of turning insert.
P – Insert with clearance under main cutting edge (11°).
M – Tolerances and dimensions of carbide turning insert.
T – Hole through insert and single sided chip breaker.
Application
The type of carbide grade and the coating on inserts are originally intended for steel, stainless steel and cast iron. But it also performs when milling other alloys.
How to choose the right Grade?
◆ Recommend Grade for SPMT-PM Carbide insert:
We always produce SPMT-PM milling carbide insert with PVD coating.
- JA2825: The consumption of this grade is the largest in stainless steel processing, and it has excellent performance in strength and wear resistance. 60% of stainless steel customers will choose this grade.
- JA2025: Suitable for cutting steel, stainless steel and cast iron, that is very general machining grade, suitable for many material. Because of its excellent strength and wear resistance, JA2025 is the most sold grade in milling inserts.
- JA2525: The materials suitable for processing are the same with JA2025, little harder than JA2025. When the working condition is very good, you can choose this grade because its cutting life is longer.
- JA2824: Suitable for M and S, Some precious metals were added, performance super excellent. The only disadvantage is that the price will be higher, if you want to replace high level carbide insert that is good grade.
Warm Tip
If you have any other questions, or our detailed description is not very clear? It doesn’t matter, please don’t hesitate to contact us, we will give you a perfect answer in a short time.




















