Shata Machinery offers customized production services of headstock castings and other casting machine tool components, both ductile iron and gray iron are available.
With long-term experience in machine tool casting production, we are proficient in manufacturing machine tool castings: beds, bases, housings, tables and columns.
High rigidity, great accuracy, slight thermal distortion and strong anti-vibration capability are the key advantages of our castings.
01
High Rigidity
Premium grade cast iron
Standardized casting process
Solid material density
02
Great Accuracy
Precision machining and strict dimensional inspection, ensuring tight tolerances and good assembly performance
03
Slight Thermal Distortion
Smart temperature control stress relieving treatment to remove internal stress to prevent dimensional changes caused by temperature variation
04
Strong Anti-Vibration
Precise control the material composition control and cooling parameters, to ensure dense metal structure and vibration absorption performance
Materials for Headstock Castings
Gray Cast Iron
Gray cast iron is the most commonly used material for machine tool castings, e.g. headstock castings, it's weight proportion is 70%~90%.
This is mainly because of the excellent vibration absorption of flake graphite from interior of gray cast iron. The flake graphite works as sponges, they absorb vibration by compression and deformation, turning vibration into heat energy. It more likes sitting on a soft sponge couch.
If no flake graphite, cast iron will lost vibration-absorbing medium, just like we remove all sponge of couch and sitting directly on wooden plates, feel hard and uncomfortable.
Grades of gray cast iron for machine tool castings:
HT200, JL/200, EN-GJL-200, GG20, ASTM A48 Class30, FC200
HT250, JL/250, EN-GJL-250, GG25, ASTM A48 Class35B, FC250
HT300, JL/300, EN-GJL-300, GG30, ASTM A48 Class40B, FC300
Ductile Cast Iron
For heavy-duty, high-speed and large-load machine tools, gray cast iron has obvious shortcomings:
S1: Weak strength and impact toughness - make it prone to cracking or even splitting
S2: Insufficient fatigue resistance - Long-term heavy-load operation is prone to plastic deformation, which affects the accuracy of the machine tool
Therefore, for casting components of above machine tools, ductile cast iron with better strength and impact toughness should be used instead.
The flake structure of graphite in gray iron makes material very easy to separate and break at the contact surface between graphite and iron structure.
However, ductile iron graphite is a ball-shape. It likes sand gravel, unevenly and steadily embedded in the cement, helps ductile iron withstand long-term alternating loads, effectively prevent the crack or deformation of the castings.
Grades of ductile cast iron for machine tool castings:
QT450-10, JS/450-10, EN-GJS-450-10, GGG45, ASTM 65-45-12, FCD450
QT500-7, JS/500-7, EN-GJS-500-7, GGG50, 70-50-05, FCD500
Our headstock castings are widely used on lathes, milling machines, drilling machines and boring machines.
Lathes
Engine Lathe / Conventional Lathe
Heavy-duty Lathe
CNC Lathe / Turning Center
Milling Machines
Vertical Milling Machine
Horizontal Milling Machine
Vertical Machining Center (VMC)
Gantry Machining Center
Drilling Machines
Radial Drilling Machine
Bench Drill / Vertical Drill Press
Boring Machines
Horizontal Boring Machine
Jig Borer / Precision Boring Machine
Grinders
Cylindrical Grinder
Internal Grinder
Surface Grinder
Others
Gear Cutting Machine
Screw Machine
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