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Sandvik Coromant Square (S) Turning Inserts: SNMM Insert, 25 Seat Size, 0° Clearance Angle, 1 in Insert Size, 3/8 in Thickness, 5 PK

Item # 239U831

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Product Specs

Insert Style: SNMM
Seat Size: 25
Rake: Negative (Extended-Life)
Clearance Angle: 0 °
Insert Size: 1 in
Thickness: 3⁄8 in
Corner Radius: 3⁄32 in
Application: Roughing
Chipbreaker Code: MR
Wiper Insert: No
Material Grade: 4225
ANSI Code: SNMM 866-MR 4225
Coating Process: CVD
Cutting Application: Turning
Cutting Direction: Neutral
Cutting Edge Length: 1.000 in
Finish/Coating: Multilayer TiCN/Al2O3/TiN
General Shape: Square
Hole Type: Straight Hole
ISO Code: SNMM 866-MR 4225
Included Angle: 90 °
Material: Carbide
Number of Cutting Edges: 4
Shape: Square
Through-Hole ID: 0.359 in
Manufacturer Part Number: SNMM 866-MR 4225

Compliance and Restrictions

Country Of Origin

  • Varies

About Square (S) Turning Inserts

Recommended for external turning applications such as facing, these square inserts have a 90° point angle and provide the second-strongest cutting edge of all the insert shapes. Square inserts are recommended for roughing applications and intermittent cutting.

Insert shapes are available with a range of point angles. In general, inserts with a large point angle have a stronger cutting edge but produce more vibration and require more machine power than inserts with a small point angle. Inserts with a small point angle are more versatile, provide better accessibility for detailed cutting, produce less vibration, and require less machine power than inserts with a large point angle, but they have a weaker cutting edge and may be more prone to heat damage.

Inserts are available with a negative or positive basic shape. Negative inserts have a 0° clearance angle. They provide good edge strength and are recommended for external turning and heavy cutting applications. Double-sided negative inserts offer twice as many cutting edges as positive inserts, but single-sided negative inserts provide the best stability in heavy roughing applications. Positive inserts have a clearance angle that is greater than 0° and are a good choice for internal turning applications and external turning applications on slender workpieces. Positive inserts are single sided and produce lower cutting forces than negative inserts.

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