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Disassemble the chinese spindle 1.5 kW from milling machine CNC for change angular contact bearings.

Demonstrated in detail the process of disassembly of the spindle 1.5 kW (made in China) to replace the angular contact bearings (7002C P5). This spindle is widely used in CNC milling machines made in China and not only (because of its relative cheapness).
Unfortunately no markings on it were found (there is no single letters, numbers and punctuation). Therefore, the specific manufacturer of spindles installed fiction.
Thus, in handling the product has been exceeded allowable lateral load on the bearing, resulting in internal damage. Fault manifests itself due to bad bounce, but at high rpm spindle-ringing and vibration peredayusheysya even on the frame machine.
Better not wait for the complete destruction of the bearing and jamming of the rotor and produce a replacement. What's really quite simple. While it takes a minimum of tools:
-Phillips screwdriver,
-Blade screwdriver,
-Gas-spanner,
-the hexacon spanners 3mm,
-Wrench-Spanner wrench 13mm,
-Wrench-Spanner wrench 17mm.

General view of the CNC milling machine.
General view of the CNC milling machine. Work on it was conducted primarily on wood (a deep relief).

The CNC milling machine. Mounting Spindle (snap), power cord, tubes of liquid cooling.
Mounting Spindle (snap), power cord, tubes of liquid cooling.


Before removing the spindle to make gags (like wood) for liquid-cooling tubes (to prevent the Strait of these coolant).

The CNC milling machine. Disconnect the power and cooling tubes.
Disconnect the power and cooling tubes. In the tube set prepared by us gag.
Loosen the clamp (key hex by 4) and remove spindle. Drain the coolant out of it.

The CNC milling machine. Spindle 1500 W (1.5kW)
Spindle 1500 W (1.5kW)

Chinese Spindle 1500 W (1.5kW), CNC milling machine.


The CNC milling machine. Chinese Spindle 1500 W (1.5kW) .Remove the top cover.
Remove the top cover (the hexacon spanners 3mm). In depth shows one of the plastic lid covering the upper bearing spindle. Note the presence of rust on the internal elements of the body and then see how it is present on the stator and rotor (lathe 1.5 years).
Coolant leaks are not noticed (using Antifreeze).

Chinese Spindle 1500 W (1.5kW). Unscrew the bolts plastic cap bearing spindle.
Unscrew the bolts plastic cap bearing spindle.


Lower bearing spindle is integrated into the lower housing cover.
Unscrew the bottom screws Cover spindle (the hexahedron key 3mm). It is a cap bearing the saddle. Turn off and screws (Phillips screwdriver).


Spanner to unscrew the bolt 17mm mounting the upper bearing onto the shaft (Unscrew the CW since the reverse thread). In this case, the bottom spindle key 13mm deduct shaft from scrolling.


The upper bearing is released. Vynem it will put forward when the rotor shaft down (from the rotor bearings out easily).


Using a thin screwdriver to put forward the lower housing cover. Cap sits tight. Difficulty only in the early to stick a screwdriver into the narrow gap between the lid and Corps must knock on the screwdriver hammer.

Chinese Spindle 1500 W (1.5kW). Put forward the rotor carefully.
Put forward the rotor carefully, without damaging the paint on the stator winding.

Chinese Spindle 1500 W (1.5kW). The rotor spindle. Traces of corrosion.
The rotor spindle. Traces of corrosion.

Chinese Spindle 1500 W (1.5kW). Stator of the machine spindle.
Stator of the machine spindle.


Nut draw in the inner rim of the lower bearing unscrew a gas wrench (counterclockwise),
with the spindle shaft deduct wrench open end wrench 13mm.


Remove the lid of the lower bearing.


Lower bearing spindle is removed without difficulty (no attachments, no special effort needed).
The image shows the complete set of structural elements from the bottom of the spindle disassembled.


From the top take out the spindle angular contact bearing. See spring preload bearing and washer. Take them out.


A complete set of structural elements from the top of the spindle disassembled.

Chinese Spindle 1500 W (1.5kW). Stator of the spindle.
Stator of the spindle (view from bottom).

Chinese Spindle 1500 W (1.5kW). Angular contact bearings (7002C P5) Chinese spindle. Size 35x15x9.
Angular contact bearings (7002C P5) Chinese spindle. Size 32x15x9.
Because angular contact bearings can take axial load in one direction only important to establish them in the correct position.
One side of the outer rim of radial-thrust bearing is stubborn. On view from this side of the bezel is wider (thicker) than the reverse. In this case, is the stubborn side of the rim where the mark.
Angular contact bearings must be positioned so that the thrust of his party was located closer to the rotor. Ie lower radial thrust bearing takes the thrust load UP, and the top down.

Disassemble the chinese spindel 1.5 kW from milling machine CNC for change radial-stubborn bearing
A complete set of structural elements of Chinese Spindle 1500 W (1.5kW) disassembled and a set of tools necessary for disassembly.

The logic circuit (structure) Chinese Spindle 1500 W (1.5kW). Adjust the preload angular contact spindle bearings.
The logic circuit (structure) Chinese Spindle 1500 W (1.5kW).

Attention! After assembly, the spindle must be adjusted preload angular contact bearings. Preload angular contact bearings adjustable nut located on the part of the work of the spindle (see drawing). When tightening the nut that is an effort (directed along the axis) compressing the bearings. The course is limited to control the course of the spring, located under the upper bearing.



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