THERA W
Gantry Milling Machines with Maximum Reach
The ZAYER THERA W is the logical evolution of the THERA—featuring a movable crossbeam for even greater flexibility and machining freedom. The gantry design with a fixed table, solid cast construction, and a wide range of milling heads makes the THERA W a high-performance solution for machining complex, large parts in both single-piece and series production.
Technical Data for the "
"
| CNC | Heidenhain TNC 7 | Siemens Sinumerik ONE |
| Table length | 3,500 – 20,500 mm |
| Table width | 2,000 (3,000 / 4,000 optional) mm |
| Distance between the posts | 3,000 – 5,000 mm |
| Longitudinal travel | 3,000 – 20,000 mm |
| Transverse travel | 3,750 – 5,750 mm |
| Vertical travel | 1,250 – 2,000 mm |
| Travel distance of crossbeam | 1,100 (1,350 optional) mm |
| Power | 43 kW |
| Rotational speed | 6,000 (8,000 opt.) min⁻¹ |
| Tool Magazine | 30 (40 / 60 / 80 / 100 / 120 optional) tool positions |
Applied
Design
Scope of Work
Table lengths up to 20,500 mm, table widths up to 4,000 mm—for machining even very wide and long workpieces.
Travel distances
A longitudinal stroke of up to 20,000 mm, a transverse stroke of up to 5,750 mm, and a vertical stroke of up to 2,000 mm provide ample space for large components.
Crossbeam
The additional W-axis minimizes overhang lengths, reduces bending forces, and thus enables maximum machining performance while offering greater flexibility.
Spindle Drive
Standard output of 43 kW at 6,000 min⁻¹ – optionally available with high-frequency spindles up to 18,000 min⁻¹ for both rough machining and the finest finish machining.
Axle Drive
Longitudinal axis with dual-pinion rack-and-pinion drive and two motors; transverse and vertical axes with ball screws—for powerful, precise, and repeatable movements.
Design
The machine bed, column, crossbeam, and bridge, all made of high-quality cast iron, ensure maximum structural rigidity and thermal stability—even during intensive use over long machining cycles.
Milling Heads
Angled milling heads, 30° and 45° heads, straight milling heads, high-frequency spindles, and automatic head-changing systems—for complex geometries and hard-to-reach surfaces.
Use
Ideal for mechanical and plant engineering, energy and rail vehicle manufacturing, and heavy industry—for both individual parts and mass production with the highest precision requirements.
Available Milling Head Variants
45°
30°
