What is din 69871?

What is din 69871?

Steep taper DIN ISO 7388-1 SK30/SK40/SK50 (formerly DIN 69871) The traditional interface for milling spindles DIN ISO 7388-1 (formerly 69871) distinguishes itself through its extremely robust design. Its field of application ranges from fine machining to heavy duty roughing.

What is sk taper?

These gauges are designed to test the quality and precision of the tool holder taper of steep taper DIN, CAT/ANSI, MAS 403-BT, or ISO standards. Specific testing standards for other tapers may also be available.

What is the angle of a CAT 50 taper?

45 deg.

Taper Length (B) Angle (G)
Steep Taper (CAT/ANSI) 50 0.70″ 45 deg.
Steep Taper (CAT/ANSI) 50 0.70″ 45 deg.
Steep Taper (DIN) 60 30 15 deg.
Steep Taper (CAT/ANSI) 60 1.08″ 45 deg.

What is a Weldon tool holder?

A Weldon flat is a flat section on a tool shank. When placed in a Toolholder the flat on the shank is held in place by set screws within the body of the holder. Using this flat, a set screw securely holds the tool and prevents the tool from rotating when machining.

What is the difference between CAT40 and BT40?

CAT40 VS BT40, there are 3 main differences: The length of the taper is different. BT40 toolholder has a slightly shorter taper by about 4mm. This effectively reduces the contact area in the spindle and means BT uses longer studs. So two different studs for CAT40 and BT40 are needed.

What taper angle is Cat 40?

CAT, CV or V-flange Taper

Size D1 D2
40 1.750 (44.45) 2.500 (63.05)
45 2.250 (57.15) 3.250 (82.50)
50 2.750 (69.85) 3.875 (98.41)
60 4.250 (107.95) 5.500 (139.70)

Who invented the Weldon shank?

In the winter of 1918, Carl A. Bergstrom opened the Weldon Tool Co. in Cleveland. Working from his shop atop the Blackstone Building, he developed a new kind of endmill, one with a 30° helical flute.

Is BT40 same as int40?

Differences are INT 40 has a short parallel part on the top of the taper. BT40 is just the taper, tapers are the same.