APMT Carbide Milling Insert for 90° Square Shoulder Milling

APMT1135PDER & APMT1604PDER for BAP300R and BAP400R Milling Cutters

An APMT carbide milling insert features an 85° parallelogram geometry, two cutting edges, an 11° clearance angle, a 0.8 mm (0.031″) corner radius, a 3.5 mm thickness, an 11.18 mm inscribed circle (IC), and a center mounting hole for standard cutter bodies. Engineers use APMT1135 and APMT1604 with BAP300R and BAP400R milling cutters for 90° square shoulder milling and face milling of steel, stainless steel, and cast iron.

What Is an APMT Carbide Milling Insert?

An APMT carbide milling insert supports 90° square shoulder milling and face milling with indexable milling cutters. Engineers select APMT1135 and APMT1604 when they need accurate 90° shoulders, efficient indexing, and compatibility with standard milling cutter bodies.

The insert uses an 85° parallelogram profile, two usable cutting edges, an 11° clearance angle, and a 0.8 mm corner radius. A center mounting hole fits standard screw clamping systems used in BAP300R and BAP400R cutter bodies.

Bwin recommends the BT015 grade with PVD coating for machining ISO P steel, ISO M stainless steel, and ISO K cast iron.

What Are the Specifications of APMT1135 and APMT1604?

APMT1135 and APMT1604 share the same cutting geometry, clearance angle, coating grade, and application range. Engineers choose the insert model according to the milling cutter size and cutter body configuration. APMT1135 vs APMT1604 Specifications

Specification	APMT1135PDER	APMT1604PDER
Insert Style	APMT1135	APMT1604
Shape	85° Parallelogram	85° Parallelogram
Cutting Edges	2	2
Clearance Angle	11°	11°
Corner Radius	0.8 mm (0.031″)	0.8 mm (0.031″)
IC Size	11.18 mm	11.18 mm
Thickness	3.5 mm	4.76mm
Center Hole	Yes	Yes
Recommended Grade	BT015, BM035, BT065, BM085	BT015, BM035, BT065, BM085
Compatible Cutter	BAP300R	BAP400R
Primary Operation	Square Shoulder Milling, Face Milling	Square Shoulder Milling, Face Milling

Both APMT1135 and APMT1604 allow operators to switch inserts without changing machining strategy because both models share the same cutting geometry.

Which Materials Can APMT Inserts Machine?

BT015 grade is suitable for machine steel, stainless steel, and cast iron and PVD coating.

BT065 grade is suitablefor ISO P steels, APMT1135 maintains stable chip formation during medium-feed shoulder milling. The insert supports reliable dimensional accuracy while maintaining a maximum depth of cut of 3.0 mm.

BM035 grade is suitable for ISO M stainless steel, APMT1604 helps reduce built-up edge through its polished cutting edge and PVD coating. Stable clamping also minimizes runout influence during continuous face milling.

BM085 grade is suitable for processing difficult to machine materials such as nickel alloys and chromium alloys

What Cutting Parameters Should You Start With?

The following cutting data provides a starting point for the APMT milling insert when machining steel. Engineers should adjust cutting parameters according to spindle power, tool overhang, machine rigidity, and workpiece conditions.

Recommended Cutting Parameters

Workpiece Material	Cutting Speed (Vc)	Feed per Tooth (fz)	Maximum Depth of Cut (ap)
Steel (ISO P)	150–250 m/min	0.08–0.15 mm/tooth	3.0 mm
Stainless Steel (ISO M)	Adjust according to rigidity	Adjust according to rigidity	Up to 3.0 mm
Cast Iron (ISO K)	Adjust according to rigidity	Adjust according to rigidity	Up to 3.0 mm

When increasing Material Removal Rate (MRR), engineers normally increase feed per tooth before increasing depth of cut. Operators should also check spindle runout before production because runout directly affects edge utilization.

Why Choose APMT1135 and APMT1604?

APMT1135 and APMT1604 combine standardized geometry with compatibility across common milling cutter systems.

The 85° parallelogram geometry produces 90° square shoulders during shoulder milling. The 11° clearance angle reduces contact between the insert flank and the workpiece during cutting.

The center mounting hole supports standard screw clamping in BAP300R and BAP400R cutter bodies. Operators can index the carbide insert after edge wear and continue machining with the second cutting edge.

The BT015 grade with PVD TiAlN coating covers steel, stainless steel, and cast iron machining, allowing one insert grade to support multiple workpiece materials.

Frequently Asked Questions

Q: What is the difference between APMT1135 and APMT1604?

A: APMT1135 and APMT1604 use the same 85° parallelogram geometry, two cutting edges, an 11° clearance angle, a 0.8 mm corner radius, and the BT015 grade. Engineers choose the model according to the cutter body size.

Q: Which milling cutters fit these inserts?

A: APMT1135 and APMT1604 fit BAP300R and BAP400R series milling cutters with standard center-hole clamping.

Q: Which materials can the BT015 grade machine?

A: The BT015 grade with PVD coating machines ISO P steel, ISO M stainless steel, and ISO K cast iron.

Q: What is the recommended maximum depth of cut?

A: Engineers can start with a maximum depth of cut of 3.0 mm when machining steel and adjust parameters according to machining conditions.

Q: Can one insert perform both face milling and square shoulder milling?

A: Yes. Engineers use the APMT milling insert for face milling and 90° square shoulder milling with BAP300R and BAP400R cutter bodies.

Request a Quote for APMT Milling Inserts

Tell us your cutter model, workpiece material, spindle speed, and machining application. Our engineering team will recommend the appropriate APMT1135 or APMT1604 insert, the BT015 grade, and starting cutting parameters for your milling operation.

Quick Selection Guide for APMT1135 & APMT1604 Grades

Choose the insert grade according to your workpiece material and machining application.

If your workpiece is stainless steel (ISO M) and you use APMT1135 or APMT1604, then choose BM035 for general stainless steel milling, face milling, and 90° square shoulder milling.

If your workpiece is nickel alloy or chromium alloy and you use APMT1135 or APMT1604, then choose BM085 for heat-resistant alloy components, aerospace parts, and high-temperature alloy machining.

If your workpiece is mild steel and you use APMT1135 or APMT1604, then choose BT065 for structural steel machining, general face milling, and square shoulder milling.

If your workpiece includes steel (ISO P) or stainless steel (ISO M) and you use APMT1135 or APMT1604, then choose BT015 for general-purpose production, mixed-material machining, and continuous face milling.

APMT Carbide Milling Insert | APMT Milling Insert for 90° Milling