Pinnacle U5
Image: pinnacle-mc.com, Pinnacle
Key Specifications
Spindle Taper
Tool Capacity
Spindle Power
x axis travel
y axis travel
z axis travel
How much does the Pinnacle U5 cost?
Price estimate
We do not have a price for the Pinnacle U5 that we can stand behind, so we show no number. Configuration, options and installation move the final price a long way: a quote is the reliable figure.
Overview
The Pinnacle U5 is a small vertical machining center built around an ultrasonic spindle, for grinding and milling brittle and very hard materials. Travels are 510 mm (20.1 in) in X, 410 mm (16.1 in) in Y and 510 mm (20.1 in) in Z.
Ultrasonic machining superimposes a small axial vibration on the rotating tool. Pinnacle gives the range of vibration frequency as 20-35 KHz and the range of amplitude as 1-14 µm with automatic frequency sweep, and says the power reaches the tool by non-contact electricity transfer. The stated benefits are lower cutting stress, longer tool life and a surface that needs less polishing.
The materials named on the page are glass, ceramics and semiconductors, along with conductive metals. These are jobs where a conventional cutter chips the edge of the part or wears out quickly.
Mechanically the U5 resembles Pinnacle's small high-speed machines. The spindle is BT30, direct drive at 24,000 rpm with 3.7 / 5.5 kW (5.0 / 7.4 hp). The table carries 300 kg (661 lb), the magazine 20 tools of up to 4 kg (9 lb), and the specification table lists a rapid feed rate of 48 m/min. The machine weighs 3,400 kg (7,496 lb), runs on 220 V at 15 kVA and takes 1,700 x 2,250 mm (66.9 x 88.6 in) of floor. An amplitude measuring device is optional.
Full Specifications
| Parameter | Value |
|---|---|
| X Axis Travel | 510 mm (20.1 in) |
| Y Axis Travel | 410 mm (16.1 in) |
| Z Axis Travel | 510 mm (20.1 in) |
| Max Table Load | 300 kg (661 lb) |
| Distance Spindle Nose to Table | 150~660 mm (5.9~26.0 in) |
| T-Slots | 14 x 125 x 3 |
| Spindle Taper | BT30 |
| Spindle Center to Column | 462 mm (18.2 in) |
| Spindle Speed Direct Drive | 24,000 rpm |
| Draw Bar Force | 250 kgf |
| Spindle Motor Power | 3.7 / 5.5 kW (5.0 / 7.4 hp) (con/30 min) |
| Rapid Traverse Xyz | 48 m/min |
| Cutting Feed Rate | 20,000 mm/min |
| Tool Capacity | 20 |
| Max Tool Diameter (full magazine) | Ø 75 mm (Ø 3.0 in) |
| Max Tool Length | 150 mm (5.9 in) |
| Max Tool Weight | 4 kg (9 lb) |
| Air Requirement | 6 kg/cm² |
| Power Requirements | 220 V |
| Power Requirement | 15 kVA |
| Coolant Tank Capacity | 150 L |
| Machine Weight | 3,400 kg (7,496 lb) |
| Machine Height | 2,815 mm (110.8 in) |
| Floor Space | 1,700 x 2,250 mm (66.9 x 88.6 in) (L x W) |
Specifications sourced from pinnacle-mc.com — verified 2026-10-04
Strengths & Limitations
Strengths
- Ultrasonic spindle with a 20-35 KHz frequency range and 1-14 µm amplitude
- 24,000 rpm direct-drive BT30 spindle
- Non-contact electricity transfer to the tool
- Small footprint of 1,700 x 2,250 mm (66.9 x 88.6 in)
Limitations
- 3.7 / 5.5 kW (5.0 / 7.4 hp) spindle is not meant for conventional heavy milling
- Tools limited to 150 mm (5.9 in) in length and 4 kg (9 lb)
- The amplitude measuring device for automated feedback is optional
Best For
Frequently Asked Questions
01
Brittle, extra hard and tough materials. Pinnacle names conductive metallic materials and non-conductive, non-metallic brittle materials such as glass, ceramics and semiconductors, and lists the dental, medical, 3C, hardware, green and aerospace industries.
02
The range of axial tool vibration frequency is 20-35 KHz and the range of amplitude 1-14 µm, with automatic frequency sweep. Electricity is transferred to the spindle without contact, and Pinnacle quotes a transfer efficiency of up to 93%.
03
The spindle is BT30 with a maximum speed of 24,000 rpm, direct drive. Power is 3.7 / 5.5 kW (5.0 / 7.4 hp), continuous and 30 minute, and the clamping force 250 kgf.
04
Only in size. The Pinnacle U8 has 810 mm (31.9 in) of X and 510 mm (20.1 in) of Y and weighs 3,600 kg (7,937 lb). The ultrasonic spindle, the 20-tool magazine and the 300 kg table load are the same.
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