CNC turning lathe, Swiss type lathe original manufacturer since 2007.
Car milling compound nc machine tool guide bearing is introduced
what car milling compound nc machine tools is the upper guide bearing? Is detailed to introduce below:
< br / >
1, the role of the guide bearing:
car milling compound nc machine tool guide rail bearing set limits generator spindle is the purpose of the work, make its can only within the scope specified in the guide rail bearing clearance under radial load on the generator shaft.
< br / >
2, the working principle of the guide bearing:
the working principle of thin oil lubrication bearing block type unit mainly in the high speed rotates, the use of lubricating oil into the combination of bearing and shaft neck surface to lubrication bearing, after oil cooler cooling, lubrication of hot oil into the combination of bearing and shaft neck surface again. With the operation of the unit, automatic cooling lubricants by reciprocating cycle. The spindle rotates, between the journal and bushing surface form stable oil wedge, bear radial load, and transferring them to guide on the bearing seat, and then transferred to the rack.
3, the structure of the guide bearing:
CNC lathe guide bearing is a kind of thin oil lubrication bearing, mainly composed of bearing cover, oil box, cooler, return pipe screw, bearing, bearing, load, thermometer, etc. B two units of standing guide sleeve is divided into eight guide bush, according to the circumference uniformly distributed on the generator shaft guide shaft neck.
< br / >
4, bearing temperature increases in the cost and unit vibration analysis: by running the observation and analysis of maintenance, thought to cause the bearing temperature rise and the main reason for the vibration has two;
( 1) The increase of the bearing clearance is far greater than the design requirements of clearance, leads to the formation of a lubricating oil into the bearing bushing surface is not easy to oil wedge, cause poor lubrication, cause temperature rise of guide bearing, the vibration increases.
( 2) Shaft contact point on the surface of the ceramic tile is lesser, contact is not enough, do not conform to the requirements of the equipment specification.
< br / >
5, the temperature rise of the guide bearing solutions
according to the manufacturer's design requirements, continuous running when the car milling compound CNC machine tools, high temperature of the cooling water is not more than 25 ° c, temperature and oil temperature of high temperature ceramic tile should not exceed 65 ° c. Wattage and the change of oil temperature is not only related to the temperature of the cooling water, and the cycle of lubricating oil and the clearance between the journal and the spindle axis. Numerical control lathe without the permission of the guide bearing clearance is 0. 2 to 0. 3 mm( Two-way clearance) , bearing lower into lubricating oil. When the main shaft clockwise operation, lubricating oil is easy to enter the guide bearing of the bearing surface and produce oil wedge. Lubrication of ceramic tile surface, even through the spindle big swinging point, although matching small gap, but due to the short distance, good lubrication condition, less friction heat, cooling effect is good, generally does not lead to bearing temperature rise phenomenon, also won't lead to ceramic tile burning.
< br / >
JSWAY can also foster research that is more useful and influential in society at large.
To reduce your production costs, get your and mill axis from Zhongshan JSTOMI CNC Machine Tool Co., Ltd. ,you will get high quality warranty at favorable price in return. Visit JSTOMI CNC Machine.
A wholesaler should have many multi axis cnc machine based products that could help you if you have a mill axis problem. It is better to treat the problem early rather than have to deal with it later. Zhongshan JSTOMI CNC Machine Tool Co., Ltd. is your best choice.
cnc service continued to evolve to having strong manufacturers develop huge marketers and people came to value their opinions about what to buy.
Daily “Clean + Lubricate” as the Baseline
After each shift, remove chips and coolant residue from the fixture surface and collet jaws with a soft cloth or air gun to prevent corrosion and re-clamping errors. Every eight hours, apply a trace of rust preventive oil to spring collets, guide bushings and other moving parts; once a week, add a thin coat of grease to ball-screw nuts and hydraulic cylinder rods to reduce wear. Before any prolonged shutdown, spray anti-rust oil on internal bores and locating faces and wrap them in wax paper or plastic film.
Precision Calibration & Data Closure
Use ring gauges or master bars every month to verify repeatability of the fixture; log results in the MES. If deviation exceeds 0.005 mm, trigger compensation or repair. For quick-change systems (HSK/Capto), check taper contact percentage every six months—target ≥ 80 %. If lower, re-grind or replace.
Spare Parts & Training
Keep minimum stock of jaws, seals and springs to enable replacement within two hours. Hold quarterly on-machine training sessions for operators on correct clamping practices and anomaly recognition to eliminate abusive clamping.
In short, embedding “clean–lubricate–inspect–calibrate” into daily SOP keeps the fixture delivering micron-level accuracy, reduces downtime, and extends overall machine life.
Six preventive measures
Environment control: keep the workshop at a stable temperature and low humidity; exclude dust and corrosive gases to reduce chemical wear on guideways and screws.
Daily checks: remove chips every shift and inspect the lubrication of the spindle, bearings, ball screws and guideways; act on any abnormality immediately.
Preventive lubrication: replace lubricants on schedule and keep the lubrication system unobstructed to minimize fatigue wear.
Accuracy monitoring: use laser interferometers or ball-bar systems monthly to measure geometric errors and compensate for ball-screw backlash or guideway straightness in time.
Electrical health checks: periodically examine cables, relays and cooling fans to prevent hidden aging caused by overheating.
Data monitoring: onboard sensors record spindle current, vibration and temperature; cloud-based analytics predict early bearing or tool failures.
Why prevention matters
• Ensures machining consistency: eliminating micron-level error sources keeps batch dimensions stable and reduces scrap.
• Extends machine life: preventing micro-cracks from growing can prolong overall life by more than 20 %.
• Reduces unplanned downtime: planned maintenance replaces emergency repairs, increasing overall equipment effectiveness (OEE) by 10 % or more.
• Cuts total cost: lower spare-parts inventory, labor and lost-production costs can save tens of thousands of dollars per machine annually.
• Enhances brand reputation: consistent on-time, defect-free deliveries strengthen customer trust and secure future orders.
Optimizing cycle time on turn-mill machining centers is crucial for boosting productivity and reducing costs. It requires a systematic approach addressing machine tools, cutting tools, processes, programming, fixtures, and material flow.
Ensure Geometric Accuracy
Swiss-type lathes process long, slender workpieces with multi-axis synchronization. A bed inclination of only 0.02 mm/m creates a “slope error” along the Z-axis, tilting the tool relative to the part centerline. This results in taper on outer diameters and asymmetric thread profiles. Periodic re-verification and re-leveling restore overall geometric accuracy to factory standards, guaranteeing consistent dimensions during extended production runs.
Extend Guideway and Ball-Screw Life
When the machine is not level, guideways carry uneven loads and lubricant films become discontinuous, accelerating localized wear and causing stick-slip or vibration. After re-leveling with shims or wedges, load distribution evens out, reducing guideway scoring and ball-screw side-loading. Service life typically improves by more than 20 %.
Suppress Thermal Growth and Vibration
A tilted bed leads to asymmetric coolant and lubricant flow, generating thermal gradients. Subsequent expansion further amplifies geometric errors. Re-verifying level, combined with thermal compensation, produces a more uniform temperature rise and reduces scrap caused by thermal drift. Additionally, a level bed raises natural frequencies, cutting chatter amplitude and improving surface finish by half to one full grade.
Chinese-built Swiss-type lathes have moved beyond the “low-cost substitute” label to become the “value leader” for overseas users. On the cost side, machines of comparable specification are priced well below those of traditional leading brands, and ongoing maintenance costs amount to only a fraction, dramatically lowering the entry barrier for small-to-medium job shops in Europe and North America. Lead time is equally compelling: major domestic OEMs can ship standard models within weeks, and special configurations follow shortly thereafter. When urgent orders arise from the electric-vehicle or medical-device sectors, Chinese production lines consistently deliver rapid responses.
Intelligence is on par with top-tier global standards. Machines routinely feature thermal compensation, AI-based tool-life prediction, and cloud-enabled remote diagnostics. Mean time between failures is long, and fully open data interfaces simplify secondary development for end users. Complementing this is a worldwide service network: Chinese manufacturers maintain parts depots and resident field engineers across the Americas, Europe, and Southeast Asia, enabling on-site support often within a single day, whereas legacy brands usually require factory returns measured in weeks.
1. Quick Troubleshooting Steps
Check the clamping pressure: Ensure the pressure plate or collet applies even force; too much or too little pressure will jam the bar. Adjust the pneumatic or hydraulic release mechanism accordingly.
Align the material path: Verify that the bar feeder, guide bushing, and spindle centers are collinear; any offset will cause the bar to twist or wedge.
Inspect belts and rollers: Belts must be tensioned correctly—loose belts slip, over-tight belts bind. Replace worn rollers immediately.
Lubricate moving parts: Clean and grease the eccentric shaft, release cam, and pusher fingers; lack of lubrication is a common cause of seizure.
I. Installation Guidelines for Swiss-Type Lathe Bed
1. Foundation Preparation
Floor Requirements: The Swiss lathe bed must be installed on a solid, level concrete foundation to prevent machining inaccuracies caused by ground settlement or vibration.
Load Capacity: The foundation must support the machine’s weight and dynamic cutting forces to avoid deformation affecting spindle and guide bushing alignment.
Vibration Isolation: If the workshop has vibration sources (e.g., punch presses, forging machines), anti-vibration pads or isolation trenches are recommended to enhance CNC machine stability.
Summary
Ball screws are the physical enablers of Swiss-type lathes across five critical dimensions:
Micron-level positioning for complex micro-structures;
High-speed rigidity supporting synchronized multi-axis cutting;
Active thermal control ensuring batch consistency;
Ultra-wear-resistant design enabling maintenance-free operation for 10+ years.
Their performance defines the precision ceiling of Swiss-type machining – truly "invisible champions" in precision transmission.