-
Deep Groove Ball Bearing
- Deep Groove Ball Bearing 6000 Series
- Full Complement Deep Groove Ball Bearing 6000-V Series
- Flanged Deep Groove Ball Bearing F6000 Series
- Deep Groove Ball Bearing 6200 Series
- Deep Groove Ball Bearing 6200NR Series
- Deep Groove Ball Bearing 6300 Series
- Deep Groove Ball Bearing 6300NR Series
- Deep Groove Ball Bearing 6400 Series
- Deep Groove Ball Bearing 6000NR Series
- Deep Groove Ball Bearing 6700 Series
- Flanged Deep Groove Ball Bearing F6700 Series
- Deep Groove Ball Bearing 6800 Series
- Full Complement Deep Groove Ball Bearing 6800-V Series
- Flanged Deep Groove Ball Bearing F6800 Series
- Deep Groove Ball Bearing 6900 Series
- Full Complement Deep Groove Ball Bearing 6900-V Series
- Flanged Deep Groove Ball Bearing F6900 Series
- Deep Groove Ball Bearing 62200 Series
- Deep Groove Ball Bearing 62300 Series
- Deep Groove Ball Bearing 63000 Series
- Deep Groove Ball Bearing 63800 Series
- Full Complement Deep Groove Ball Bearing 63800-V Series
- Deep Groove Ball Bearing 16000 Series
- Double Row Deep Groove Ball Bearing 4200 Series
- Double Row Deep Groove Ball Bearing 4300 Series
- Deep Groove Ball Bearing Inch R Series
- Deep Groove Ball Bearing Inch RMS Series
- Miniature Deep Groove Ball Bearing
-
Spherical Roller Bearings
- Spherical Roller Bearing 21300 Series
- Spherical Roller Bearing 22200 Series
- Spherical Roller Bearing 22300 Series
- Spherical Roller Bearing 23000 Series
- Spherical Roller Bearing 23100 Series
- Spherical Roller Bearing 23200 Series
- Spherical Roller Bearing 23900 Series
- Spherical Roller Bearing 24000 Serie
- Spherical Roller Bearing 24100 Series
- Split Style Spherical Roller Bearing
- Thrust Roller Bearing
-
Joint Bearing
- Radial Spherical Joint Plain Bearing GE...E
- Radial Spherical Joint Plain Bearing GE...ES
- Radial Spherical Joint Plain Bearing GE...ES-2RS
- Rod End Joint Bearing PHS/PHSB
- Rod End Joint Bearing GE...C
- Rod End Joint Bearing SI...TK
- Rod End Joint Bearing NHS
- Rod End Joint Bearing GIR...DO
- Rod End Joint Bearing GIR...C
- Rod End Joint Bearing GIR...UK
- Rod End Joint Bearing SQZ...RS
- Rod End Joint Bearing SA...T/K
- Rod End Joint Bearing POS/POSB
- Rod End Joint Bearing NOS
- Rod End Joint Bearing GAR...DO
- Rod End Joint Bearing GAR...C
- Rod End Joint Bearing GAR...UK
- Rod End Joint Bearing SQ...RS
- Rod End Joint Bearing SA...E
-
Angular Contact Ball Bearings
- Single Row Angular Contact Ball Bearing 7000 series
- Single Row Angular Contact Ball Bearing 7200 series
- Single Row Angular Contact Ball Bearing 7300 series
- Single Row Angular Contact Ball Bearing 7900 series
- Double Row Angular Contact Ball Bearing 3200 Series
- Double Row Angular Contact Ball Bearing 3300 Series
- Qj2 Series Four Point Angular Contact Ball Bearing
- Qj3 Series Four Point Angular Contact Ball Bearing
-
Tapered Roller Bearings
- Single Row Tapered Roller Bearing 30200 Series
- Single Row Tapered Roller Bearing 30300 Series
- Single Row Tapered Roller Bearing 31300 Series
- Single Row Tapered Roller Bearing 32000 Series
- Single Row Tapered Roller Bearing 32200 Series
- Single Row Tapered Roller Bearing 32300 Series
- Single Row Tapered Roller Bearing 33000 Series
- Single Row Tapered Roller Bearing 33100 Series
- Single Row Tapered Roller Bearing 33200 Series
- Single Row Tapered Roller Bearing Inch Series
- Double Row Tapered Roller Bearing 350000 Series
- Double Row Tapered Roller Bearing Inch Series
- Four-row Tapered Roller Bearing 380000 Series
- Four-row Tapered Roller Bearing Inch Series
-
Needle Roller Bearing
- HK Style Standard Needle Roller Bearing
- HF Style Standard Needle Roller Bearing
- F Style Standard Needle Roller Bearing
- K Style Standard Needle Roller Bearing
- SCE Style Standard Needle Roller Bearing
- CF Style Standard Needle Roller Bearing
- HFL Style Standard Needle Roller Bearing
- TA Style Standard Needle Roller Bearing
- NATR Style Standard Needle Roller Bearing
- BK Style Standard Needle Roller Bearing
- NA Style Standard Needle Roller Bearing
- NK Style Standard Needle Roller Bearing without Inner Ring
- NKI Style Standard Needle Roller Bearing with Inner Ring
- NKIS Style Standard Needle Roller Bearing with Inner Ring
- NKS Style Standard Needle Roller Bearing without Inner Ring
- RNA Standard Needle Roller Bearing without Inner Ring
- Inch-Style Needle Roller Bearing
- MR Series Heavy Duty Needle Roller Bearing
- Self-Aligning Ball Bearings
-
Cylindrical Roller Bearings
- Cylindrical Roller Bearing N Series
- Cylindrical Roller Bearing NU Series
- Cylindrical Roller Bearing NJ Series
- Cylindrical Roller Bearing NF Series
- Cylindrical Roller Bearing NUP Series
- Cylindrical Roller Bearing NFP Series
- Cylindrical Roller Bearing NH(NJ+HJ) Series
- Cylindrical Roller Bearing NN Series
- Cylindrical Roller Bearing NNU Series
- Cylindrical Roller Bearing NNF Series
- Cylindrical Roller Bearing FC Series
- Cylindrical Roller Bearing FCD Series
- SL Sheave Wheel Series Cylindrical Roller Bearing
- Thrust Ball Bearing
-
Pillow Block Bearing
- Pillow Block Bearing UC Inserts
- Pillow Block Bearing UK Inserts
- Pillow Block Bearing SB Inserts
- Pillow Block Bearing SA Inserts
- Pillow Block Bearing CS Inserts
- Pillow Block Bearing UCP
- Pillow Block Bearing UKP
- Pillow Block Bearing SAP
- Pillow Block Bearing SBP
- Pillow Block Bearing UCPA
- Pillow Block Bearing UKPA
- Pillow Block Bearing UCPH
- Pillow Block Bearing UKPH
- Pillow Block Bearing UCF
- Pillow Block Bearing UKF
- Pillow Block Bearing UCFL
- Pillow Block Bearing UKFL
- Pillow Block Bearing UCFC
- Pillow Block Bearing UKFC
- Pillow Block Bearing UCFA
- Pillow Block Bearing UKFA
- Pillow Block Bearing UCFB
- Pillow Block Bearing UKFB
- Pillow Block Bearing UCT
- Pillow Block Bearing UKT
- Pillow Block Bearing UCC
- Pillow Block Bearing SBPP
- Pillow Block Bearing SAPP
-
Linear Bearing
- Standard Linear Bearing LM Series
- Adjustable Type Linear Bearing LM-AJ Series
- Open Type Linear Bearing LM--OP Series
- Lengthened Type Linear Bearing LM-L Series
- Standard Linear Bearing LME Series
- Adjustable Type Linear Bearing LME-AJ Series
- Open Type Linear Bearing LME-OP Series
- Lengthened Type Linear Bearing LME--L Series
- Standard Linear Bearing LMB Series
- Adjustable Type Linear Bearing LMB--AJ Series
- Open Type Linear Bearing LMB--OP Series
- Lengthened Type Linear Bearing LMB--L Series
- Round Flange Linear Bearing LMF Series
- Square Flange Type Linear Bearing LMK Series
- Oval Flange Linear Bearing LMH Series
- Round Flange Linear Bearing LMF--L Series
- Square Flange Type Linear Bearing LMK-L Series
- Oval Flange Linear Bearing LMH-L Series
- Pilot Flange Linear Bearing LMFP Series
- Pilot Flange Linear Bearing LMKP Series
- Pilot Flange Linear Bearing LMHP Series
- Pilot Flange Linear Bearing LMFP-L Series
- Pilot Flange Linear Bearing LMKP-L Series
- Pilot Flange Linear Bearing LMHP-L Series
- Middle Flanged Linear Bearing LMFC-L Series
- Middle Flanged Linear Bearing LMKC-L Series
- Middle Flanged Linear Bearing LMHC-L Series
- Round Flange Linear Bearing LMEF Series
- Square Flange Type Linear Bearing LMEK Series
- Round Flange Linear Bearing LMEF-L Series
- Square Flange Type Linear Bearing LMEK-L Series
- Middle Flanged Linear Bearing LMEKC-L Series
- Middle Flanged Linear Bearing LMEFC-L Series
- Round Flange Linear Bearing LMBF Series
- Square Flange Type Linear Bearing LMBK Series
- Round Flange Linear Bearing LMBF-L Series
- Compact Ball Bushing KH Series
- SC UU Slide Block Unit Series
- SC LUU Linear Case Unit Series
- SC VUU Linear Pillow Block Unit Series
- SBR UU Support Rail Unit Series
- SBR LUU Support Rail Unit Series
- TBR UU Support Rail Unit Series
- SCE UU Slide Block Unit Series
- SCE LUU Linear Case Unit Series
- SCE VUU Linear Pillow Block Unit Series
- Vertical Shaft Support SK Series
- Horizontal Shaft Support SHF Series
- Other Bearings
Technical Trends of Bearings for Machine Tool Spindles
The coexistence of high speed and high rigidity
Under the background of the development of machine tools, the tendency of multi-variety and low-volume production, variable varieties and mass production, and total engineering has become even higher. The processing of multiple workpieces on multiple machines is combined into one machine tool, or multiple processes such as rough machining and finishing are combined into a few projects to contribute to improving production performance and saving space. Therefore, for machine tool spindles, there is a need to develop a wide range of machining from low-speed rotating heavy cutting to high-speed rotating light cutting. As a bearing, the coexistence of high speed and high rigidity is required. For high speed, the single dmn value of the bearing achieves 4~5 million for angular contact ball bearings and 2~3 million for cylindrical roller bearings, which meets the requirements of machine tools. However, attaching importance to high speed is disadvantageous to rigidity. For this reason, in the design of the spindle, there are many cases where high speed and high rigidity have to be emphasized at the same time. It can also be seen from this that maintaining high speed and having the necessary rigidity on the heavy cutting side is a subject for future bearing development.
New lubrication method
Lubrication is roughly divided into oil lubrication and grease lubrication. Generally, oil lubrication is used where high-speed machining is important, and grease lubrication is used where low-speed rotation and cost, usability, and reduction of environmental load are important. However, with the advancement of machine tools, it is hoped that there will be a lubrication method that can satisfy both processing occasions at the same time.
As a bearing manufacturer, oil lubrication is improved to maintain high-speed machining while saving energy and improving environmental performance, or the development of technology to improve grease lubrication is underway. In other words, lubrication technology is an element that has a great influence on bearing performance, and there are many issues that need to be developed in the future.
Bearing design
Compared with the original high-speed bearing, the high-speed limit of the R-type bearing is increased to about 1.3 times that of the original bearing, and the temperature rise is reduced by 20 %~30%. R-type bearings with ceramic material used for rolling elements, and C-type bearings have the same tendency compared to the original bearings. The R-type design that emphasizes rigidity according to the rotation speed during use and the C-type that emphasizes load capacity The choice of design becomes possible. According to the effect of improving the high-speed performance of high-performance bearings and reducing temperature rise, it is also possible to use positioning preload with excellent rigidity for high-speed rotating spindles.
Compared with the current high-performance cylindrical roller bearings, it is confirmed that the high-speed performance is improved by about 1.5 times and the temperature rise is reduced by about 15%. The advantages brought by the high speed of cylindrical roller bearings make the spindle structure simple. Generally, the support structure on the rear side of the main shaft needs to be able to absorb the expansion and contraction of the shaft according to temperature changes. Although cylindrical roller bearings are suitable for this function, because the high-speed performance of cylindrical roller bearings has not been very complete so far, the structure of 'angular contact ball bearing sub-housing' is generally used for the back support of the high-speed spindle. However, the new high-performance cylindrical roller bearing developed this time can also be used for high-speed spindles, so the structure around the bearing can be greatly simplified.
Current high-performance cylindrical roller bearings, during high-speed rotation, the cage will be damaged, which makes the high-speed performance have a limit, but as long as this shortcoming is improved, the high-speed performance can be further improved. First of all, as for the material of the cage, compared with the original polyamide resin, it adopts a light weight suitable for high-speed rotation, and a high-strength resin improves the strength. Furthermore, when rotating at a high speed, it becomes a neck-like structure at the contact part of the cage and the roller, which optimizes the contact shape of the roller in the cage pocket, reducing friction and low temperature rise. In addition, the ferrule material is the same as the original product, and the easy-to-handle bearing steel is used, and the high-speed performance is improved through the internal design suitable for high-speed rotation.
High reliability
In order to improve the reliability of machine tools, the reliability of bearings must be improved. For this reason, the life of the bearing is established based on the detected bearing temperature or vibration, so prediction technology is indispensable. Furthermore, if the load on the bearing can be detected, the most suitable preload and lubrication can be self-controlled according to the machining state. As a result, it will be compatible with high-speed performance and high rigidity in a wide machining area. It's possible. Based on this, JTEKT has developed a unique mechanism that applies the most appropriate preload to the bearing according to the speed. This mechanism can have sufficient rigidity from low to high speed. The combination of high-output built-in motor can make high-load processing more efficient. conduct.
The original positioning preload method, the rigidity of the spindle will increase with the increase of the speed, but when this mechanism is used, especially the rigidity of the spindle in the low-speed rotation area when high torque occurs, it will increase dramatically. Preload method suitable for high-load processing. A technological boom is emerging in the mold industry, further accelerating the technological update of my country's mold industry. China's mold industry is facing a 'big wave and scouring period'. Many new-type companies will take the lead in the technological revolution, but more small companies are hanging by a thread.