Steep taper ASME B5.50 CAT40/CAT50
The traditional interface for milling spindles ASME B5.50 distinguishes itself through its extremely robust design. Its field of application ranges from fine machining to heavy duty roughing. The tool holder is pulled in the milling spindle with the help of an additional pull stud. The centering takes place via the taper contact. Therefore, the ASME B5.50 steep taper interface is primarily suitable for applications with a spindle speed of up to 25,000 rpm.
Technical specifications ASME B5.50
Steep taper CAT40
- Tool holders case-hardened 60 – 2 HRC
- Tensile strength in the core at least 950 N/mm2
- Taper in tolerance quality AT3
- Angle of cone: 8° 17'50'' +4''
- Form ADB: interior coolant supply through centre (form AD) and through the collar (form B)
| CAT40 | D1 | D2 | D3 max | D4 | D5 | D6 | L1 | L2 | L3 | L4 min. | L5 | T | T1 | B1 | B2 | B3 |
| [inch] | 1.75 | 0.669 | 1.71 | 2.5 | 2.126 | 0.39 | 2.687 | 0.75 | 0.625 | 1.38 | 0.44 | 5/8" - 11 | 0.18 | 0.646 | 0.89 | 0.984 |
Steep taper CAT50
- Tool holders case-hardened 60 – 2 HRC
- Tensile strength in the core at least 950 N/mm2
- Taper in tolerance quality AT3
- Angle of cone: 8° 17'50'' +4''
- Form ADB: interior coolant supply through centre (form AD) and through the collar (form B)
| CAT50 | D1 | D2 | D3 max | D4 | D5 | D6 | L1 | L2 | L3 | L4 min. | L5 | T | T1 | B1 | B2 | B3 |
| [inch] | 2.75 | 1.063 | 2.71 | 3.875 | 3.307 | 0.39 | 4.0 | 0.75 | 0.625 | 1.38 | 0.44 | 1" - 8 | 0.18 | 1.02 | 1.39 | 1.484 |
Coolant supply ASME B5.50
According to ASME B5.50, 3 possibilities of inner coolant supply are available:
- Form A: No inner coolant supply
- Form AD: Central coolant supply through retention knob. A retention knob with centralized bore is required.
- Form B: Lateral coolant supply via the collar. A sealed retention knob is required.
HAIMER clamping devices with taper according to ASME B5.50 are performed in form ADB unless otherwise noted:
Form ADB means: the clamping devices are equipped with bores for form AD as well as for form B. Unless otherwise stipulated, the tool holders are delivered in form AD. The bores at the collar for form B are then sealed with plastic-dowels and secured with lock screws.
For changing to form B, the bores at the collar must be opened by unscrewing
the lock screw halfway. Extraction of screws together with the dowels by using pliers. The bores also can be sealed again. A conversion kit consisting of dowels and lock screws is available
Attention: Each dowel for single use only!
