Comprehensive Interpretation on the Direction and Trend of Import and Export Pol

(8) CNC grinding machine: gears manufacture precision is not less than 5, number of motion axes≥4, machining diameter ≥130mm, roller cutter rotating speed ≥1500r/min.

Imports of key spare parts and accessories enjoying tax-free are: mainshaft bearing , hydraulic cylinder, rolling guide set, linear scale(including radial gratings), multihead metering pump, diamond grinding wheel, built-in grinding wheel dynamic balance device.

(9) CNC straight side press and large-sized multi-station press

<1> CNC straight side press: nominal pressure≥6000kN, working plate size≥1000mm×1200mm, nominal pressure strok≥l0mm, time of slide stroke≥8 times /min

<2> large-sized multi-station press: nominal pressure≥10000kN, working plate size≥2000mm×4000mm, time of slide stroke≥8 times /min(select two from the three qualifications)

Imports of key spare parts and accessories enjoying tax-free are:
main drive motor, proportional servo valve and timing valve, wet clutch, CNC hydraulic cushions (valve box) and CNC hydraulic cushions (hydraulic cylinder).

(10) CNC compound machine of laser pressing and cutting: nominal pressure≥300kN, maximum speed of working plate≥80m/min, laser power≥2000W (select two from the three qualifications)

Imports of key spare parts and accessories enjoying tax-free are:
laser generator, cutting heads, lens, reflectoscope and hydraulic devices (pumping plant and hydraulic cylinder).

(11) CNC under-floor wheel lathe: maximum cutting area≥10mm2/tool rest, tread radical circle run-out≤0.1mm,same axes bore diameter deviation≤0.1mm(select two from the three qualifications).

Imports of key spare parts and accessories enjoying tax-free are: cutting tools, automatic measuring device, hydraulic pump and proportional servo valve, works piece supporting device, scraping device and bearing.

Imports of spare parts and accessories for the above-mentioned eleven kinds of CNC lathe are also listed in the import tax-free catalogue, they are: shaft coupling, ball screw assembly, towline, rack, gear down box, numerical controller and servo motor, linear scale (including radial gratings), straight-line rolling guide set, guideway cover, screw bearing and mainshaft bearing.

(12) Multi-species parts in the flexible manufacturing system can be in automatic replacement processing or mixed-flow processing, with the functions of material transportation, processing quality supervision and tools management, etc.

Imports of key spare parts and accessories enjoying tax-free are: mould, blade, cylinder, solenoid valve and hydraulic system (pumping station and oil tank)

(13) Numerical Control device resolution≤0.0001mm, speed regulation precision≤0.1%, coupling axis number ≥ four axles, single axle rapid traverse≥60m/min (select two from the four qualifications).

Imports of key spare parts and accessories enjoying tax-free are: industrial motherboard (586 degree and above), Power module, spindle drive control unit, servo motor in the drive, brakes, encoders 26 and above, chips, electrolytic capacitors and servo motor.

(14) high-speed spindle (machining centers) spindle speed ≥ 12000r/min, power ≥ 20kW, output torque ≥ 200N •m, rotary precision ≤ 0.001mm (selecting two from four).

Imports of key spare parts and accessories enjoying tax-free are: servo devices, encoders, directional devices, oil lubrication device, built-in motor (stator, rotor) and broaching tools (pulling claws, spring).

(15) ball screw accuracy ≤ 0.004mm/2π.

Imports of key spare parts and accessories enjoying tax-free are: Alloy Steel (100 ~ 400kg / screw), steel ball (440 ~ 660 / screw).

(16) Power Tool CNC turret power ≥ 4, repeat positioning accuracy ≤ 2 ", power head speed ≥ 5000r/min (select two from three).

Imports of key spare parts and accessories enjoying tax-free are: hydraulic indexing motor, built-in servo motor group, turntable composite bearings, clamping devices, seals, spiral bevel gear, power tool carrier and bearings.

(17) CNC rotary table indexing accuracy ± 5 ", repetitive positioning accuracy of ± 1".

Imports of key spare parts and accessories enjoying tax-free are: worm-gear, turntables composite bearings, tray taut body turret clamping device, encoders 26 or above, flat rotating plate, end-gear.

(18) Linear Rolling Guide single rail length ≥ 4m, Rolling Guide precision ≤ 0.003mm / m.

Imports of key spare parts and accessories enjoying tax-free are: alloy steel (30 ~ 300kg), ball / roller (160 ~ 640 / guide).

(19) Tool change speed of Automatic Tool Changer <2s.

Imports of key spare parts and accessories enjoying tax-free is cam case.