High precision ball bearings

GMN High precision ball bearings Page 4 Product overview Page 6 Spindle ball bearings Page 8 Materials Page 10 Standard series S, SM, KH Page 14 Deep groove ball bearings Page 45 Types, materials Page 46 Bearing designation Bearing data Page 50 Special designs for direct lubrication +A, +AB, +L, +LB, +AG Page 16 Special series BHT, BNT Page 19 Bearing designation Bearing data Page 20 Engineering Page 56 Bearing selection Page 57 Preload Page 60 Bearing arrangements Page 64 Spacers Page 66 Contact angle Matching accuracy Page 67 Precision classes Page 68 Accuracy of associated components Page...

GMN High precision ball bearings On the basis of long experience in the development and production of high-quality machine components, GMN has specialized in the field of high-precision ball bearings to manufacture high performance, long-life deep groove and spindle bearings. Certification under international standards guarantees the highest levels of precision in the development and production of GMN ball bearings and secures consistently outstanding quality characteristics with regard to speed suitability, stability and durability. This comprehensive product line comprises – in addition to...

GMN Spindle ball bearings Standard series: S, SM, KH www.gmn.de GMN Deep groove ball bearings Standard series: 60../62.. Series: S Special design (oil lubrication): +A, +AB, +L, +LB Version: +A Special design (grease lubrication): +AG ■ Reference speed coefficient: 1.7 ■ 106mm/min Series SM ■ Optimized inner ring geometry ■ Reference speed coefficient: 2.0 ■ 106mm/min Series KH ■ Sealed for lifetime grease lubrication ■ or open for oil lubrication ■ Reference speed coefficient: 2.1 ■ 106mm/min Version +A ■ Oil supply through outer ring (open side) ■ Optimized for minimum quantity lubrication...

Product characteristics: · Bore diameter 5–120mm · Nominal contact angle 15°–25° · Forces are transmitted from one raceway to the other under this pressure angle · Optimized for maximum speeds GMN High precision spindle ball bearings Materials Hybrid ball bearings · Absorbs large radial and axial loads · Placement against a second bearing is necessary · Larger number of balls than with deep groove ball bearings · Great rigidity and load capacity · All series and sizes are available as hybrid bearings · All GMN ball bearings are available greased · All GMN bearing bore sizes are available with...

Materials Rings GMN uses only high-quality materials and processing techniques to manufacture all components of its high precision spindle ball bearings. The highest standards of quality assure the best possible performance efficiency and optimal service life for GMN products. GMN ball bearing components are continuously being optimized by ongoing development efforts to further improve their technical characteristics. Due to their outstanding characteristics, cage types TA and TXM exhibit exceptional performance with respect to speed, load capacity and service life. Inner and outer ring TXM cage...

balls (standard material) Material Bearing steel (chrome steel) 100 Cr 6 Material no. 1.3505, SAE 52100, SUJ2 Special steels on request Permissible operating temperature Heat treated for continuous operating temperatures up to 150oC Hardness 60 to 64 HRC, fully hardened; corresponds to 700-800 HV30 Characteristics High purity and homogeneity, vacuum-degassed Hybrid ball bearings are characterized by a combination of materials; bearing steel (inner and outer rings) and ceramic (balls). The material-based characteristics of ceramic balls (in comparison to bearings with steel balls) offer clear...

Standard S, SM and KH series spindle bearings from GMN cover a Series S comprehensive range of sizes, types and designs. Based on a diverse choice of products, GMN offers quality-oriented and economic spindle bearing solutions for a large number of specific requirements. Series SM Series KH The GMN Series S product line covers an extensive range of dimensions, speed suitability and load carrying capacity. ■ Standard spindle bearings ■ High speed suitability and rigidity ■ Highly economical and reliable Due to optimized inner geometry, GMN Series SM permits almost 20 % higher speeds - in comparison...

Special designs Direct oil lubrication Conventional oil-lubricated spindle bearings are provided with oil through an oil supply hole located on the side. GMN spindle bearing designs +A, +AB, +L and +LB permit a direct supply of oil to the point of lubrication through a hole in the outer ring. Special design +A Oil supply Special design +AB Oil supply Lubrication hole to the raceway on the open side · Optimized for highest speeds · Optimized for highest speeds · Reduced bearing wear · Reduced bearing wear · High operating security · High operating security · Suffix A (designation example: HY SMA...

Special designs Grease re-lubrication Special series Separable bearings To assure maximum machine operation time, GMN also offers spindle bearings which can deliver regulated quantities of lubricant through holes in the outer ring directly to the point of lubrication without complex oil lubricant supply systems. The BHT and BNT series bearings developed by GMN are fully capable bearing assemblies which can be disassembled quickly to assure fast, uncomplicated handling for assembly and maintenance. Re-lubrication system Bevel form as series S Lubrication holes to the raceway on the open side Re-lubrication...

Example Material - Bearings made of bearing steel have no designation N Bearings made of high nitrogen steels, special material (on request) HY Balls and rings made of different materials (HYBRID bearings) GMN High precision spindle ball bearings Bearing data Bore diameter 5 to 120 mm Boundary dimensions Ball data Dimensions Abutment dimensions Weight Contact angle Load rating Speed values Preload / axial rigidity