TH850 bare machine is integrally formed by precision casting through resin sand type high-strength cast irons, with reasonable ribbon structure, good rigidity, totally aged treatment and strong stability. The Y-axis motor is postposed and can be maintained conveniently. The stanchions adopt herringbone structure so that the excellent stability of mainshaft head can be improved when moving. The counterweight hammer for mainshaft head is fixed by a guide rod so that the machining precision is not influenced owning to the shaking of counterweight hammer. The three-axis guideway adopts imported overloaded precision-level linear guideway, with larger size than that produced by general factories. The screw rod adopts imported R40-010 C3-grade grinding screw rod, with two ends being fixed and pre-stretched. All bearings are imported P5-grade bearings in pair. The mainshaft is BT40 precision mainshaft produced in Taiwan, with the maximum rotating speed of 8000r/min. Stainless steel protective shields are provided before and after Y axis, on the left side and right side of X axis and below Z axis. Furthermore, automatic lubricating systems are provided, and tool storage mounting surfaces are reserved. The appearance of bare machine shall be painted with required colors. The bare machine does not contain any electrical apparatuses.
| Item | Requirement (unit) or specification | Remarks |
| Dimensions of worktop | 500X1000 | |
| Distance from end surface of mainshaft to worktop | 110-610 | |
| Vertical stroke (Z) of mainshaft | 500 | |
| Lateral stroke (X) of mainshaft | 800 | |
| Longitudinal stroke (Y) of worktable | 500 | |
| X-axis linear guideway | HGH45HAP | Hiwin |
| Y-axis linear guideway | HGH45HAP | Hiwin |
| Z-axis linear guideway | HGH55HAP | Hiwin |
| Three-axis ball screw rod | R40-010-0.008
C3-grade | Hiwin |
| Type and rotating speed of mainshaft | Unit (r/min) | Volis |
| Three-axis bearing | Angle-contacted P5-level bearings in pair | Germany |
| Connecting forms of three-axis and mainshaft | Directly-connected three-axis and mainshaft connected by synchronous belt | |
| Torque of Recommended three-axis motor X/Y/Z | 10Nm 12Nm 12Nm | |
| Recommended power of mainshaft | 7.5-11KW | |
| Quantity-dimension*spacing of T-shaped trough of worktable | 5-18X90 | |
| Planeness of worktable | 0.02 | |
| Maximum loading capacity of worktable | 500(Kg) | |
| Verticality of Z axis on XY axis | 0.02 | |
| Planeness of Z axis when moving | 0.015 | |
| Positioning precision | 0.01 | |
| Net weight of bare machine | 4186Kg | |
| Outline dimension | 2350X1950X2200 | |
