1 in 90 Deg Square Shoulder Indexable End Mill - Precise Milling

In this review the Accusize 1 in 90 Deg Square Shoulder Indexable End Mill is evaluated for machinists who need a compact, indexable cutter for square shoulder, side, and slot milling. The single biggest reason to consider this tool is its practical balance of a true 1 in cutting diameter with replaceable APKT1604 TiN coated carbide inserts, which delivers consistent surface finish and predictable tool life across wood and a wide range of metals.

Key Features

• 1 in cutting diameter: Provides a stable platform for accurate square shoulder and full slot milling where a 1 in cutter is required.
• Dual APKT1604 inserts: Uses two TiN coated APKT1604 carbide inserts to extend wear life and maintain cut quality during production runs.
• Durable tool geometry: A 1 in shank and 3-3/4 in overall length keep runout low for improved surface finish and dimensional control.
• Secure insert mounting: M4 x 8 screws hold inserts firmly in place to reduce chatter and indexing variation during heavier cuts.
• Versatile material compatibility: Rated for hardwood, MDF and metals including low to high-carbon steels, alloy steels and aluminum alloys for mixed-shop flexibility.
• Recommended cutting parameters: Designed to run at 394 to 786 SFM with feeds of 0.002 to 0.004 per tooth to balance removal rate and insert life.

Who It's For

The tool suits small shops and jobbers who need a compact indexable end mill for square shoulder and slotting tasks across mixed materials, including woodworking and general metalworking. Its replaceable APKT1604 inserts make it economical for shops that prefer indexable tooling over solid carbide for simpler insert swaps and consistent finish.

It is less ideal for shops that consistently demand heavy interrupted cuts in very hard steels without first confirming rigidity and machining strategy; a solid carbide cutter or different geometry may be preferable for sustained high-rigidity steel work where customers reported occasional breakage on tough slotting tasks.

Pros & Cons

Pros

• Good surface finish and cut quality with TiN coated APKT1604 inserts for routine milling tasks.
• Economic and easy to regrind or replace inserts, offering value for money for production runs.
• Compact 3-3/4 in overall length and 1 in shank reduce deflection in normal setups.

Cons

• Some users reported limited rigidity and occasional insert or tool failure when slotting very hard materials like 1045 steel, so care is needed for heavy steel work.

Specifications

Cutting Diameter D	1 in
Shank Diameter d1	1 in
Overall Length (OAL)	3-3/4 in
Depth of Cut (ap)	0.551 in
Number of Inserts	2 APKT1604
Screw Size	M4 x 8
Recommended Cutting Speed	394 - 786 SFM; feed 0.002 - 0.004 per tooth

Our Verdict

The Accusize 1 in indexable square shoulder end mill is a practical, cost-effective choice for shops needing a compact cutter with replaceable APKT1604 inserts. It delivers reliable cut quality and good finish for woodworking and general metal milling, offering solid value, though operators should verify setup rigidity before aggressive steel slotting.

Frequently Asked Questions

Are the inserts included?
Yes, the cutter uses two APKT1604 TiN coated carbide inserts as its standard configuration.

What materials can this cutter handle?
It is suitable for hardwood, MDF and metals including low to high-carbon steel, alloy steel and aluminum alloys when run within recommended parameters.

Is it suitable for heavy slotting in steel?
It can perform slotting, but some users reported breakage when slotting harder steels; ensure a rigid setup and conservative parameters for demanding steel work.