Nc handle expertise

Spindle taper holes in machining centers are usually divided into two main categories, namely the universal system with a taper of 7:24 and the HSK vacuum system with a taper of 1:10.
1. There are usually five standards and specifications for universal shank with a taper of 7:24:
NT (traditional) NT or ST for short)
DIN 69871 (German standard) (abbreviated as JT, DIN, DAT or DV)
IS0 7388/1 (International Standard) (IV or IT for short)
MAS BT (Japanese Standard) (BT for short)
ANSI/ASME (CAT)
NT shank German standard is DIN 2080, is in the traditional machine tool through the pull rod to pull the shank tight, also known as ST;
The other four kinds of tool handles are on the machining center through the tool handle tail pull the tool handle machining center spindle taper hole is usually divided into two categories, that is, 7:24 taper universal system and 1:10 HSK vacuum system.
1. There are usually five standards and specifications for universal shank with a taper of 7:24:
NT (traditional) NT or ST for short)
DIN 69871 (German standard) (abbreviated as JT, DIN, DAT or DV)
IS0 7388/1 (International Standard) (IV or IT for short)
MAS BT (Japanese Standard) (BT for short)
ANSI/ASME (CAT)
NT shank German standard is DIN 2080, is in the traditional machine tool through the pull rod to pull the shank tight, also known as ST;
The other four kinds of handles are all pulled tight on the machining center through the pull nail at the end of the handle. At present, DIN 69871 (namely JT) and MAS BT are the most used tool handles in China. DIN 69871's shank can be fitted to DIN 69871 and ANSI/ASME spindle cone hole machines, and IS0 7388/1's shank can be fitted to DIN 69871, IS0 7388/1 and ANSI/ASME spindle cone hole machines, so in terms of versatility, The handle of IS0 7388/1 is the best.
★ There are three key parameters: θ Angle, length l and thread G
There are several cases about the θ Angle of the shank nail:
1, MAS BT (Japanese standard) shank nail θ Angle has 45°, 60° and 90°, commonly used is 45° and 60°;
2, DIN 69871 shank nail (usually known as DIN 69872-40/50) θ Angle only 75°;
3, IS0 7388/1 shank nail (commonly known as IS0 7388/2-40/50) θ Angle has 45° and 75°;
4, ANSI/ASME tool handle nail θ Angle has 45°, 60° and 90°.
For the thread G of the shank puller, except for the ANSI/ASME shank puller that has an inch thread standard, the other three are metric threads. The 40# shank puller is usually M16 thread, and the 50# shank puller is usually M24 thread.
The hilts of 7:24 are:
JT Series shank (ISO, German DIN standard, Chinese GB standard)
BT Series Knife Handle (MAS standard in Japan)
JT-WA Series Shank (German VDI standard)
JT-U Series Shank (ANSI standard)
CAT Series Shank (ANSI Standard - Caterpillar)
ST Series Knife handle (Chinese GB standard)
SK Series Shank (DIN standard)
2. HSK vacuum Knife handle 1:10
The German standard for HSK vacuum shank is DIN69873. There are six standards and specifications, namely HSK-A, HSK-B, HSK-C, HSK-D, HSK-E and HSK-F, and three are commonly used: HSK-A (automatic tool change with in-band cold), HSK-C (manual tool change with in-band cold) and HSK-E(automatic tool change with in-band cold, high-speed type).
The universal tool holder of 7:24 is connected by the 7:24 cone of the tool holder and the 7:24 cone of the main shaft hole of the machine tool. It has limitations in three aspects: high-speed machining, connection rigidity and coincidence accuracy.
The HSK vacuum tool holder is deformed by the elasticity of the tool holder. Not only the 1:10 cone of the tool holder is in contact with the 1:10 cone of the main shaft hole of the machine tool, but also the flange plate surface of the tool holder is in close contact with the spindle surface. This double-sided contact system is superior to the universal tool holder in terms of high-speed machining, connection rigidity and coincidence accuracy.
Automatic tool change without manipulator. The BT50 shank is interchangeable with the JT50 shank
DIN 2080 (NT or ST for short)
DIN 2080 is the German standard, that is, the international standard ISO 2583, is what we usually call NT type tool holder, can not use the mechanical arm of the machine tool and manually load the tool.
(2) DIN 69871 (JT, DIN, DAT or DV)
About NT
NT is just our common name, with the British system. General devil's NT is NT (U) and NT (m). DIN2080 is metric. The domestic ST standard is formulated in accordance with DIN2080 standard, so ST is NT (m) and DIN2080 can be universal.
The standard number of JT is GB10944, which is formulated with reference to DIN69871/1 and is universal with ISO7388/2. DIN69871 general German abbreviation: SK three standard parameters can be universal. So some people call it JT, ISO, DIN, SK, DV, DAT, that's what some companies call it. ★ There are three key parameters: θ Angle, length l and thread G
There are several cases about the θ Angle of the shank nail:
1, MAS BT (Japanese standard) shank nail θ Angle has 45°, 60° and 90°, commonly used is 45° and 60°;
2, DIN 69871 shank nail (usually known as DIN 69872-40/50) θ Angle only 75°;
3, IS0 7388/1 shank nail (commonly known as IS0 7388/2-40/50) θ Angle has 45° and 75°;
4, ANSI/ASME tool handle nail θ Angle has 45°, 60° and 90°.
For the thread G of the shank puller, except for the ANSI/ASME shank puller that has an inch thread standard, the other three are metric threads. The 40# shank puller is usually M16 thread, and the 50# shank puller is usually M24 thread.
The hilts of 7:24 are:
JT Series shank (ISO, German DIN standard, Chinese GB standard)
BT Series Knife Handle (MAS standard in Japan)
JT-WA Series Shank (German VDI standard)
JT-U Series Shank (ANSI standard)
CAT Series Shank (ANSI Standard - Caterpillar)
ST Series Knife handle (Chinese GB standard)
SK Series Shank (DIN standard)
2. HSK vacuum Knife handle 1:10
The German standard for HSK vacuum shank is DIN69873. There are six standards and specifications, namely HSK-A, HSK-B, HSK-C, HSK-D, HSK-E and HSK-F, and three are commonly used: HSK-A (automatic tool change with in-band cold), HSK-C (manual tool change with in-band cold) and HSK-E(automatic tool change with in-band cold, high-speed type).
The universal tool holder of 7:24 is connected by the 7:24 cone of the tool holder and the 7:24 cone of the main shaft hole of the machine tool. It has limitations in three aspects: high-speed machining, connection rigidity and coincidence accuracy.
The HSK vacuum tool holder is deformed by the elasticity of the tool holder. Not only the 1:10 cone of the tool holder is in contact with the 1:10 cone of the main shaft hole of the machine tool, but also the flange plate surface of the tool holder is in close contact with the spindle surface. This double-sided contact system is superior to the universal tool holder in terms of high-speed machining, connection rigidity and coincidence accuracy.
Automatic tool change without manipulator. The BT50 shank is interchangeable with the JT50 shank
DIN 2080 (NT or ST for short)
DIN 2080 is the German standard, that is, the international standard ISO 2583, is what we usually call NT type tool holder, can not use the mechanical arm of the machine tool and manually load the tool.
(2) DIN 69871 (JT, DIN, DAT or DV)
About NT
NT is just our common name, with the British system. General devil's NT is NT (U) and NT (m). DIN2080 is metric. The domestic ST standard is formulated in accordance with DIN2080 standard, so ST is NT (m) and DIN2080 can be universal.
The standard number of JT is GB10944, which is formulated with reference to DIN69871/1 and is universal with ISO7388/2. DIN69871 general German abbreviation: SK three standard parameters can be universal. So some people call it JT, ISO, DIN, SK, DV, DAT, that's what some companies call it.