Three-Flute Drill Extends Tool Life at Higher Feed Rates
Mapal’s three-flute Tritan-Drill is said to achieve more bores, a longer tool life and lower machining costs compared with two-flute drills.
Mapal’s three-flute Tritan-Drill is said to achieve more bores, a longer tool life and lower machining costs compared with two-flute drills. This universal drill handles a range of materials and provides rounder bores with fewer burrs, the company says, thanks in part to a tool geometry optimizing chip removal and providing low cutting pressure. The drill’s design enables higher feed rates with process reliability, and includes chip formation features making it useful for long-chipping materials. Models are available with diameters ranging from 5 to 20 mm and in lengths ranging to 8×D.
Applications include machining cylinder heads at high feed rates, VA rails made of heat-resistant steel alloys, and turbochargers made of cast steel. The drill can handle steels, cast materials and nonferrous metals.
To make the transition to hard turning, you'll need to switch from carbide to CBN inserts, but that is easier (and more economical) than you might think. It's making the jump to much higher surface speeds that might scare you off. It needn't. Here's why.
Reducing cutting fluid use offers the chance for considerable cost savings. Tool life may even improve.
Running rotary milling cutters at the proper speeds and feeds is critical to obtaining long tool life and superior results, and a good place to start is with the manufacturer's recommendations. These formulas and tips provide useful guidelines.