KAAST F-Turn 330/820
Key Specifications
Spindle Power
control
swing over bed
swing over carriage
max turning diameter
distance between centers
How much does the KAAST F-Turn 330/820 cost?
Price estimate
We do not have a price for the KAAST F-Turn 330/820 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 KAAST F-Turn 330/820 is a heavy CNC lathe for large-bore work: 820 mm (32.28 in) between centers, a maximum turning diameter of Ø500 mm (19.5 in) and a spindle bore of Ø102 mm (3.95 in), or Ø165 mm (6.5 in) as an option. It weighs 8,870 kg (19,514 lb) and runs under the Fanuc 0i-TF control.
The headstock is geared. KAAST lists 2 steps with ZF gears, a spindle speed row of 625-2,500 rpm and spindle power of 22/26 kW (30/35 hp). A two-step gearbox trades top speed for torque at low speed, which suits large diameters and tough materials, and the 2,500 rpm ceiling is what that costs when the work is small. The A-Turn 300/700, with its 500 mm (19.7 in) turning diameter, runs to 3,500 rpm on 18.5 kW (25 hp) and weighs 5,500 kg (12,130 lb).
Bar capacity is Ø89 mm (3.4 in), with Ø116 mm (4.5 in) as an option that by its size needs the larger bore. The chuck is Ø300 mm (11.7 in), or Ø380 mm (14.75 in) as an option, on an A2-8 nose or the optional A2-11.
The turret has 10 stations, or 12 as an option, and takes 32 x 32 mm (1.25 x 1.25 in) toolholders, with 25 x 25 mm (1 x 1 in) as the alternative. Axial holders are Ø50 mm (2 in). A live tool speed of 0-2,000 rpm is listed, but the table has no row for driven tool power or a C axis, so confirm what the live tooling package includes. The tailstock is manual as standard and programmable as an option, with 780 mm (30 in) of travel and a Ø110 mm (4.3 in) MT5 quill that extends 100 mm (3.9 in).
X travel is 280 mm (10.75 in) and Z travel 885 mm (34.5 in). Rapids are 12 m/min (468 in/min) in X and 15 m/min (585 in/min) in Z, from servo motors of 4 kW (5.5 hp) on each axis. The machine is 5,300 x 2,100 x 2,235 mm (208 x 83 x 88 in), and the coolant tank holds 140 L (36 gal).
Full Specifications
| Parameter | Value |
|---|---|
| CNC Control | Fanuc 0i-TF |
| Swing Over Bed | Ø660 mm (25.75 in) |
| Swing Over Carriage | Ø480 mm (18.5 in) |
| Max Turning Diameter | Ø500 mm (19.5 in) |
| Distance Between Centers | 820 mm (32.28 in) |
| Spindle Nose | A2-8 (opt. A2-11) |
| Spindle Bore | Ø102 mm (3.95 in) (opt. Ø165 mm / 6.5 in) |
| Bar Capacity | Ø89 mm (3.4 in) (opt. Ø116 mm / 4.5 in) |
| Spindle Speed Range | 625-2,500 rpm |
| Spindle Gear Steps | 2 steps (ZF gears) |
| Live Tool Speed Max | 0-2,000 rpm |
| Chuck Size | Ø300 mm (11.7 in) (opt. Ø380 mm / 14.75 in) |
| Turret Stations | 10 (opt. 12) |
| Toolholder Size | 32 x 32 mm (1.25 x 1.25 in) (opt. 25 x 25 mm / 1 x 1 in) |
| Axial Tool Holder Diameter | Ø50 mm (2 in) |
| X Axis Travel | 280 mm (10.75 in) |
| Z Axis Travel | 885 mm (34.5 in) |
| Rapid Traverse X | 12 m/min (468 in/min) |
| Rapid Traverse Z | 15 m/min (585 in/min) |
| Spindle Motor Power | 22/26 kW (30/35 hp) |
| Servo Motor X Z | 4 kW (5.5 hp) each |
| Tailstock | Manual (opt. programmable) |
| Tailstock Travel | 780 mm (30 in) |
| Tailstock Quill Travel | 100 mm (3.9 in) |
| Tailstock Quill Diameter | Ø110 mm (4.3 in) |
| Tailstock Quill Taper | MT5 |
| Coolant Tank | 140 L (36 gal) |
| Machine Dimensions | 5,300 x 2,100 x 2,235 mm (208 x 83 x 88 in) (L x W x H) |
| Machine Weight | 8,870 kg (19,514 lb) |
Specifications sourced from kaast-usa.com — verified 2026-09-25
Strengths & Limitations
Strengths
- Ø102 mm (3.95 in) spindle bore as standard and Ø165 mm (6.5 in) as an option, for tube and large bar
- Two-step ZF gearbox with 22/26 kW (30/35 hp) of spindle power
- Ø110 mm (4.3 in) MT5 tailstock quill with 780 mm (30 in) of tailstock travel
- 32 x 32 mm (1.25 x 1.25 in) toolholders and Ø50 mm (2 in) axial holders for heavy tooling
- 8,870 kg (19,514 lb) of machine weight, against 5,500 kg (12,130 lb) for the A-Turn 300/700
Limitations
- Top spindle speed is 2,500 rpm, where the A-Turn 300/700 reaches 3,500 rpm
- Rapids of 12 m/min (468 in/min) in X and 15 m/min (585 in/min) in Z are well below the 20 m/min (780 in/min) and 24 m/min (945 in/min) of the A-Turn 300/700
- The standard turret has 10 stations; 12 stations are an option
- The tailstock is manual unless the programmable option is ordered
- The speed row reads 625-2,500 rpm without saying how the range divides between the 2 gear steps; ask for the lowest usable speed
Best For
Frequently Asked Questions
01
Ø102 mm (3.95 in) as standard, with Ø165 mm (6.5 in) as an option. Bar capacity is Ø89 mm (3.4 in), or Ø116 mm (4.5 in) as an option. The spindle nose is A2-8, with A2-11 optional, and the chuck is Ø300 mm (11.7 in) or the optional Ø380 mm (14.75 in).
02
KAAST lists a spindle speed row of 625-2,500 rpm, 2 gear steps with ZF gears and spindle power of 22/26 kW (30/35 hp). The table does not state the speed limits of each gear step or a torque figure, so ask for both if the work involves heavy cuts at large diameter.
03
A live tool speed of 0-2,000 rpm is listed, and axial tool holders are Ø50 mm (2 in). The listed figures do not include driven tool power or a C-axis row, so confirm with KAAST what the live tooling includes and whether it is part of the base machine.
04
A manual tailstock as standard, with a programmable tailstock as an option. Tailstock travel is 780 mm (30 in). The quill is Ø110 mm (4.3 in) with an MT5 taper and 100 mm (3.9 in) of travel, and the distance between centers is 820 mm (32.28 in).
05
The F-Turn 330/820 is the heavier, slower, larger-bore machine: 8,870 kg (19,514 lb), 2,500 rpm, 22/26 kW (30/35 hp) and Ø89 mm (3.4 in) bar capacity. The A-Turn 300/700 is listed at 5,500 kg (12,130 lb), 3,500 rpm, 18.5 kW (25 hp) and 75 mm (3 in) bar capacity, with faster rapids of 24 m/min (945 in/min) in Z.
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