Pinnacle U8
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 U8 cost?
Price estimate
We do not have a price for the Pinnacle U8 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 U8 is the larger of Pinnacle's two ultrasonic machining centers, with 810 mm (31.9 in) of X travel and 510 mm (20.1 in) in Y and Z. It carries the same ultrasonic BT30 spindle as the U5 in a longer frame.
The extra travel is for bigger plates and for fixtures holding several parts. Hard, brittle workpieces are often thin and produced in batches: glass covers, ceramic substrates, silicon components. A longer table lets more of them be set up at once, within a 300 kg (661 lb) load limit.
The process figures are those of the series. The tool vibrates axially at 20-35 KHz with an amplitude of 1-14 µm, energy is passed to the rotating spindle without contact, and the spindle turns at up to 24,000 rpm on 3.7 / 5.5 kW (5.0 / 7.4 hp). Pinnacle lists rigid tapping and a spindle oil cooler among the standard accessories and an amplitude measuring device as an option for closed-loop control of the tool amplitude.
Structure is Meehanite cast iron with linear ways and class C3 ball screws. The spindle centre is 562 mm (22.1 in) from the column, further out than on the U5. Weight is 3,600 kg (7,937 lb), floor space 2,200 x 2,380 mm (86.6 x 93.7 in), and the supply 220 V at 15 kVA.
Full Specifications
| Parameter | Value |
|---|---|
| X Axis Travel | 810 mm (31.9 in) |
| Y Axis Travel | 510 mm (20.1 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 4 |
| Spindle Taper | BT30 |
| Spindle Center to Column | 562 mm (22.1 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 | 3,600 kg (7,937 lb) |
| Machine Height | 2,815 mm (110.8 in) |
| Floor Space | 2,200 x 2,380 mm (86.6 x 93.7 in) (L x W) |
Specifications sourced from pinnacle-mc.com — verified 2026-10-04
Strengths & Limitations
Strengths
- 810 mm (31.9 in) of X travel for batches of brittle parts
- Ultrasonic spindle at 20-35 KHz, up to 24,000 rpm
- Spindle centre 562 mm (22.1 in) from the column for wider plates
- Rigid tapping and spindle oil cooler in the standard accessories
Limitations
- Table load remains 300 kg (661 lb)
- Magazine holds 20 tools of at most Ø 75 mm (Ø 3.0 in)
- Spindle power of 3.7 / 5.5 kW (5.0 / 7.4 hp) limits ordinary milling
Best For
Frequently Asked Questions
01
810 mm (31.9 in) in X, 510 mm (20.1 in) in Y and 510 mm (20.1 in) in Z. The spindle nose is 150~660 mm (5.9~26.0 in) from the table and T-slots are listed as 14 x 125 x 4.
02
No. Both list a BT30 direct-drive spindle at 24,000 rpm with 3.7 / 5.5 kW (5.0 / 7.4 hp) and a 250 kgf clamping force. The Pinnacle U5 is the shorter machine at 3,400 kg (7,496 lb).
03
Pinnacle says it reduces cutting stress, extends tool life, improves surface finish and cuts down on polishing. The tool vibrates at 20-35 KHz with 1-14 µm amplitude while rotating.
04
A 220 V supply at 15 kVA, air at 6 kg/cm² and floor space of 2,200 x 2,380 mm (86.6 x 93.7 in). Height is 2,815 mm (110.8 in), weight 3,600 kg (7,937 lb) and the coolant tank 150 L.
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