MACHINE TOOL SPINDLE BEARING SELECTION & MOUNTING GUIDE

MACHINE TOOL SPINDLE BEARING SELEC

As one of the world’s leading manufacturers of rolling bearings, linear technology components and steering systems, we can be found on almost every continent – with production facilities, sales offices and technology centres – because our customers appreciate short decision-making channels, prompt deliveries and local service. Asia The Americas Oceania Africa The NSK company NSK commenced operations as the first Japanese manufacturer of rolling bearings back in 1916. Ever since, we have been continuously expanding and improving not only our product portfolio but also our range of services for...

Partnership based on trust – and trust based on quality Total Quality by NSK: The synergies of our global network of NSK Technology Centres. Just one example of how we meet our requirements for high quality. NSK is one of the leading companies with a long tradition in patent applications for machine parts. In our worldwide research centres, we not only concentrate on the development of new technologies, but also on the continual improvement of quality based on the integrated technology platform of tribology, material technology, analysis and mechatronics. More about NSK at www.nskeurope.com or...

The successful build of a spindle will depend on close attention to details as illustrated below: Pre-test Checks Trouble Shooting Fitting Bearings To Spindle

Machine Tool Precision bearings are very accurately engineered components and as such are very important to the successful performance of the machine tool. The way in which a bearing is handled and fitted to a machine tool does not only determine if the machine operates accurately but can also affect the life of the bearing in the spindle. This catalogue is intended to be a comprehensive guide to anyone who fits bearings to a machine tool regardless to whether it is in planned maintenance or reactive to a breakdown. This catalogue follows a logical progression through selection of the correct...

Bearing Selection NSK Super Precision Bearings – Product Range Several types of Super Precision Bearings are available from NSK. These include the ROBUST series of high performance bearings, special series of bearings for unique and specialised applications, and the standard series bearings. NSKHPS High Precision Angular Contact Ball Bearings Basic Super Precision Bearings manufactured to conform to ISO standards. › 70xx, 72xx, 79xx series › Contact angles: 15˚ (C), 25˚ (A5), 30˚ (A) › Cage design: phenolic (TR) or polyamide (TYN), depending on application requirements › Ball material: steel,...

Ultra High Precision Angular Contact Ball Bearings High performance bearings developed specifically for internal grinding or high-speed motor applications under spring preload. › Bore size range: ø6–25 mm, contact angle: 15˚ › Ball material: steel (S type), ceramic (H and X type) › Non separable type › Universal combinations (DU and SU) BSR Series High-Speed Angular Contact Thrust Ball Bearings High rigidity thrust bearings for lathe applications. › Contact angles: 30˚ (BAR), 40˚ (BTR) › Ball material: steel (S type), ceramic (H type) Ultra High-Speed Angular Contact Ball Bearings High performance...

Bearing Selection NSK Super Precision Bearings – Product Range High Precision Angular Contact Ball Bearings - RobustShot Series Direct oil-air lubrication in order to achieve highest speeds. › Direct air-oil Lubrication via a through-hole in the outer ring › Contact angles: 18˚ (BNR), 25˚ (BER) › Lubrication groove with O-rings in the outer ring › Hybrid bearings - steel rings, ceramic balls ROBUSTSHOT Series NSKHPS Angular Contact Thrust Ball Bearings for Ball Screw Support High rigidity thrust bearings designed specifically for ball screw support applications in machine tools. › Contact angle:...

Bearing Selection Angular Contact Ball Bearing Conventional Type 72, 70, 79 Series 70 Bearing Series Bore Number Contact Angle A = 30° A5 = 25° C = 15° Material Blank Symbol: Bearing Steel (SUJ2) SN24: Ceramic Balls Retainer TR: Phenolic Cage TYN: Polyamide Cage Seal No symbol: Open type V1V: Non contact rubber seal Mounting Configuration SU: Single Universal DU: Duplex Universal DB, DF, DT: Duplex Arrangement DBD, DFD, DTD, DUD: Triplex Arrangement DBB, DFF, DBT, DFT, DTT, QU: Quad Arrangement Preload L: Light M: Medium H: Heavy Gxx: Preload in Kgf (G5=5 Kgf) CPxx: Median Preload in Microns...

Bearing Selection Ball Screw Support Bearings BS Cylindrical Roller Bearings P2B Cylindrical Roller Designator NN: Double Row, Inner Ring Guided Rollers N: Single Row, Inner Ring Guided Rollers Series (Ball Screw Support) F: Flange type N: No Flange type Width Series Diameter Series Outer diameter Bore code Seal type Material Single RS: Bearing Steel (SUJ2) (rings and rolling elements) RX: Heat Resistant Steel (SHX) (rings and rolling elements) row only RXH: Heat Resistant Steel (SHX) for rings and ceramic rolling elements No symbol: SUJ2 steel Preload Class Iso 2 No symbol: single bearing DT:...

Nominal bore diameter Bearing design Series option Bearing arrangement ROBUSTSHOT design Thrust Angular Contact Ball Bearing 100 Bearing Bore Diameter (mm) Bearing Bore Diameter (mm) Bearing Type BAR: 30° Contact Angle BTR: 40° Contact Angle Bearing Type Dimension Series 10X: Arranged with NN30XX Series Material S: Steel Ball | H: Ceramic Ball Retainer TYN: Polyamide Cage Combination DB: Back to Back Duplex Preload L: Standard Preload EL: Standard Preload for High-Speed Applications CP: Special Preload CA: Special Axial Clearance Dimension Series 20D: High-Speed Type w/Revised Internal Features...

Bearing Selection Identification Markings NSK Precision bearings carry useful information for both the designers and fitters. The box itself will indicate date codes, serial numbers, bore, outer diameter and width deviations. This information is also found on the bearing so even if the box is lost/missing, all the relevant information is still available. Product Serial Number Every NSK brand bearing has a unique serial number; this enables complete traceability of the product since final inspection data is stored within NSK records associated with this number. on page 13 indicates that in this...