850 CNC Milling Bare Machine

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