3/4 in 90 Deg Square Shoulder Indexable End Mill - Precise Slotting

In this review the Accusize 3/4 in 90 deg square shoulder indexable end mill is judged as a practical, cost-conscious choice for machinists who need reliable square shoulder, side and slot milling. The single biggest reason to buy is its targeted geometry: a 90 degree cutting angle with 10 degree positive rectangular APKT inserts that allow higher depth of cut and feed per tooth, delivering good surface finish and removal rates in a compact 3-1/2 in overall length tool.

Key Features

• 90 degree square shoulder: Provides precise square shoulder and side milling for clean corner geometry and consistent slot width.
• Indexable APKT inserts: Uses three APKT11T3 TiN coated carbide inserts to boost metal removal while keeping insert replacement simple and cost effective.
• Screw-down attachment: M2.5 x 6.5 screws secure the inserts firmly to reduce movement and repeatability issues during production runs.
• Positive rake geometry: A radial rake of -10 degree and axial rake of +7 degree with 10 degree positive insert enables aggressive cut depths while maintaining finish quality.
• Compact dimensions: 3/4 in cutting diameter and shank with a 3-1/2 in overall length makes it suited to setups with limited stick-out.
• Material versatility: Rated for steels, alloy steels, stainless and heat resistant steels, cast irons and aluminum alloys for broad shop use.

Who It's For

This end mill is best for job shop machinists and production lines that need a robust indexable solution for square shoulder milling, side milling and full slotting in a variety of ferrous and nonferrous materials. It suits users who prefer the economy of indexable cutters and want the ability to change inserts quickly to manage tooling cost.

It is less appropriate for heavy interrupted cuts in very hard steels or applications demanding the absolute rigidity and toughness of solid carbide; some buyers reported mixed durability when slotting tougher steels, so those focused on extreme tool life under heavy loads should consider more rigid alternatives.

Pros & Cons

Pros

• Good cut quality and surface finish when used within recommended speeds and feeds.
• Economical to run thanks to indexable APKT inserts and straightforward screw-down replacement.
• Compact 3-1/2 in length and 3/4 in shank fit tighter setups and reduce deflection compared with longer tools.
• Versatile geometry handles a wide range of materials from aluminum to alloy steels.

Cons

• Durability is mixed for heavy slotting in tougher steels; a user reported a snapped tool when slotting 1045 steel.
• Insert and screw hardware must be purchased separately, adding initial setup cost.

Specifications

Cutting diameter (D)	3/4 in
Shank diameter (d1)	3/4 in
Overall length	3-1/2 in
Number of inserts	3
Insert type	APKT11T3 / APKT11T308 (sold separately)
Recommended ap	0.410 in
Screw	M2.5 x 6.5

Our Verdict

The Accusize 3/4 in 90 deg square shoulder indexable end mill is a sensible value for shops that need accurate square shoulder work and quick insert changes. It delivers good finish and efficient material removal in a compact package, though buyers doing heavy slotting in tougher steels should plan feeds conservatively or opt for a more rigid solid carbide option.

Frequently Asked Questions

Which inserts does it use?
It accepts APKT series inserts such as APKT11T3 / APKT11T308; inserts are sold separately.

Is it suitable for stainless steel?
Yes, the cutter is designed for stainless and heat resistant steels as well as alloy steels and aluminum when run at appropriate speeds and feeds.

What cutting speeds and feed rates are recommended?
Recommended cutting speeds range roughly 394 to 786 SFM with feed per tooth around 0.002 to 0.004 in, depending on material and insert grade.