Discover the world of spindle bearing from Schaeffler, the market leader in storage technology. Whether for high-speed applications or tough industrial conditions. The automotive and industrial supplier offers a wide range of spindle bearings that have proven themselves in terms of durability and precision. Machine performance can be increased with these innovative spindle bearings.
Contents
- Spindle bearings for every machine tool
- Spindle bearing made of Vacrodur with 20 times longer service life
Spindle bearings for every machine tool
06.09.2023/XNUMX/XNUMX | On the EMO 2023 Schaeffler will present its finely graduated range of spindle bearings. It consists of cylindrical roller bearings and angular contact thrust ball bearings with small, medium and large balls for axial loads. There are various types for the high-precision axial bearings Rollingsteels, cages and ceramic rolling elements. With the Schaeffler offers the right bearing configuration for every milling, turning and grinding spindle.
An Highlight is the VCM series with medium-sized balls made of high-performance Vacrodur steel. Spindle manufacturers can use this bearing to construct particularly robust and powerful spindles.
Current studies show that more than 80% of all damage to spindles that causes failures can be traced back to the spindle bearings. Schaeffler counteracts this with an innovative manufacturing process, special alloy components and a coordinated multi-stage heat treatment. The result is the high-performance roller bearing steel Vacrodur.
Spindle bearing made of Vacrodur with 20 times longer service life
31.07.2017/XNUMX/XNUMX | Schaeffler has one with Vacrodur Rolling-material developed with the manufacturer of Machine Tools can significantly increase the load capacity of the spindles in terms of dynamic load capacity. In addition to above-average loads, the service life can also be significantly extended even under the most difficult conditions. Lower unit costs, longer machine running times and higher availability are the benefits for machine tool construction.
According to current studies, a good 80% of all failure-causing spindle damage can be traced back to the spindle bearing. Schaeffler developed the new one with an innovative manufacturing process, special alloy components and a multi-stage heat treatment tailored to this High-performance roller bearing steel Vacrodur.
Vacrodur hardness stable up to 400 ° C
Unlike conventional rolling bearing steels such as 100Cr6 With Vacrodur, the hardness does not decrease at temperatures of over 120 ° C, but remains stable up to over 400 ° C. There is no structural change up to this very high temperature. All material properties change only negligibly.
Bearings for everyone in over 60 industries
Spindle bearings made from Vacrodur are therefore retained very high thermal loadhow they z. B. by the waste heat in a motor spindle or due to insufficient lubrication, highly resilient and extremely long dimensional and dimensionally stable.
The ingress of dirt is often one of the main factors limiting the service life of the spindle bearings. Several mechanisms are responsible for this: Abrasion and various initial damage to the components Particle retention.
Resistant to abrasive wear
Vacrodur from Schaeffler Technologies has a very homogeneous structure with a high proportion of very finely divided carbides. The carbides are responsible for the exceptional resistance of Vacrodur to abrasive wear. A multi-stage heat treatment of the specially alloyed material also produces very high hardness values of up to 65 HRC and a tough basic structure that can withstand the very high temperatures of the components by over 400 ° C without loss of hardness resists.
Interview: Digital service for Industry 4.0 rolling bearings
Due to the greater hardness compared to other rolling bearing steels, the Rolling over a foreign particle Smaller impressions in the career and thus also lower reproaches. These can easily be reduced again by the ductile material matrix during the subsequent rollover. In tests under controlled pollution conditions, it was possible to achieve an almost 20-fold increase in the service life up to bearing failure compared to the previous benchmark.
The high rolling resistance and resistance to Rolling fatigue With good lubrication conditions, bearings made from Vacrodur have a significantly longer service life. In certified tests, a 2,4 times higher dynamic load-bearing capacity compared to standard roller bearing steel 100Cr6 could be proven.
This corresponds to a 13 times the extension the nominal Bearing life. Under inadequate lubrication conditions there is even one 25 times the extension.
Other spindle bearings for machine tools
The main spindle is largely responsible for the performance of machine tools. Speed, rigidity and robustness determine the choice of spindle bearings. In developing the M series in X-life quality the Schaeffler engineers attached particular importance to the friction-optimized internal design and a large tolerance to rapidly changing thermal operating conditions. Because you meet them in Motor spindles frequently on.
Double row angular contact ball bearings for ball screws in machine tools
The optimized construction results in a clear lower increase in bearing preload through, for example, overlapping of the bore and bearing, high speeds and large temperature gradients between shaft and housing.
Three types of spindle bearings
The M series from Schaeffler is available in three Performance classes M, HCM and VCM.
- Within the Mvariant, the balls and rings of the X-life high-speed spindle bearings are made of 100Cr6 rolling bearing steel. This variant represents a powerful and economical bearing for motor spindles.
- The X-life high-speed spindle bearings of the HCM-variant are with Ceramics Balls, the rings are made of roller bearing steel 100Cr6. With the use of the HCM variant, the performance of motor spindles can be increased due to the very high speed suitability.
- The balls of the X-life high-speed spindle bearings VCM-Variant are also made of ceramic. The bearing rings, on the other hand, are made from the high-performance material Vacrodur described above. This high-performance steel has the outstanding properties mentioned above.
Large selection of variants with many sizes
The X-life high speed Spindle bearings M, HCM and VCM are available for the 70 and 719 series with a nominal contact angle of 17 or 25 degrees. There are three different preloads to choose from. Possible bore diameters range from 25 to 130 mm, initially sealed from 50 to 80 mm. The spindle bearings can be either open or sealed. As an option, Schaeffler offers the bearings in a Direct Lube design with lubrication holes and sealing rings on the outer ring.
Zimmer clamping elements fix machine tool axes
Machine tool and spindle manufacturers can choose between the three performance classes when converting their spindle bearings to the X-life M series. The average longer service life leads to significant savings in terms of operating costs of the machine tools.
Related to the Operating Hours there are also lower costs for spindle repairs. In particular, the spindle bearings VCM made of Vacrodur withstand even the most difficult operating conditions considerably longer than bearings made of conventional materials and make spindle drives significantly more robust. Schaeffler Technologies presented the first FAG spindle bearing series in X-life quality made from Vacrodur for the first time at EMO 2017.
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