Double Row Ball Slewing Bearings

  • Double Row Ball Slewing Bearings
  • Double Row Ball Slewing Bearings
  • Double Row Ball Slewing Bearings
  • Double Row Ball Slewing Bearings
  • Double Row Ball Slewing Bearings

Double Row Ball Slewing Bearings

Double-row ball slewing ring with same diameter balls is usually used for wind driven generators and concrete pump trucks. In wind driven generator applications, double-row ball slewing ring is often installed at the bottom of propellers for variable pitch control which requires zero clearance, large start friction moment and high running accuracy.

Range of external diameter: 300mm to 6000mm

Ring material: 42CrMo / 50Mn/ C45

Ball/roller material: GCr15

Cage material: steel 20 or ZL102 cast aluminum alloy

Spacer material: nylon 6 / nylon 66

Quenching hardness of raceway: HRC55-62

Tooth type: no gear, internal gear, external gear

Delivery time: 10-30 days


inner tooth slewing bearing ball  ball slewing bearing  external toothdouble row ball slewing no tooth



The LTZC double-row ball slewing bearing can carry axial load tilting moment and radial loads at the same time.The top ball mainly carries the axial load and positive tilting moment. The drop ball takes the opposite tilting moment. This is the reason for the loading capacity of the double row ball slewing bearing being larger than the four-point contact ball slewing bearing;however, the frictional ratio is much larger.than the latter.The LTZC double row ball slewing bearing consists of a inner ring outer ring.balls in double rows, spacers, sealing device, and other components. Due to the top ball mainly taking the axial load and tilting moment loads, the size of top balls are larger than the drop ball. In order to accommodate the various working condition at different axial load, tilting moments and axial load.the angle of contact would be adjusted accordingly.The rings structure can be divided into two types, integral type and split type.Generally,the integral type maintains a stronger rigidity. The split type is more convenient to adjust; the two segregate rings are fastened by bolts prior to delivery.The LTZC double row slewing bearing has cages (or spacing blocks) among the balls.Only when large loading is requested would the full ball type be applied. Loading capacity for full ball type is definitely larger.However, the increased friction generated by this design allows for the balls to be easily scratched.The double row slewing bearing is mainly for the working conditions when carrying an axial load, larger tilting moment, and where the mounting place is limited in radial direction. This structure provides good performance when fit into an installation when an amount of deformation may be allowed.

Features of Double Row Ball Sewing Ring Bearing

Double-row ball slewing ring bearing usually comprises 3 rings, steel balls and spacers can enter the upper and lower raceways directly. Two sets of steel ball are placed based on the force analysis. With such configuration, the 90° bearing angles of the upper and lower arc raceway enable the bearing to take large axial force and tilting moment. Special design is needed for the raceway when the radial force is greater than one tenth axial force.

Basic Structure includes:

Without gear(Type020)

With external gear(Type 021/022)

With internal gear(Type 023/024)

Range of external diameter: 100 mm to 15000 mm

Ring material: 42CrMo / 50Mn/ C45

Ball/roller material: GCr15

Cage material: steel 20 or ZL102 cast aluminum alloy

Spacer material: nylon 6 / nylon 66

Quenching hardness of raceway: HRC55-62

Tooth type: no gear, internal gear, external gear

Applications

Excavator

Crawler crane

Port machinery

Amusement facilities

Custom Bearings

Our dedicated team is on hand to provide help and expertise throughout the process. Whether you are ordering from our standard range of products or you want a tailored solution for your current project, they are ready to help you every step of the way.



Double row ball slewing bearing--- Internal gear(023/024 Series)

Bearing ModelDimensionsMounting DimensionsStructural DimensionGear dataweight  (kg)
DmmdmmHmmD1mmD2mmnφmmD3mmd1mmn1H1mmhmmbmmxMmmDemmz
023.25.500616384106580420201848247749626600.5525772100
024.25.5006350.459
023.25.560676444106640480201854253749626600.5541784115
024.25.5606410.469
023.25.630746514106710550241861260749626600.56482.481130
024.25.6308475.260
023.25.710 826594106790630241869268749626600.56560.494140
024.25.7108555.270
023.30.8009426581248987023022777771611429800.58619.278200
024.30.8001061462
023.30.90010427581249988023022877871611429800.58715.290250
024.30.9001071472
023.30.1000114285812410989023622977971611429800.51081482300
024.30.100012796.867
023.30.1120126297812412181022362210971091611429800.51092493340
024.30.112012916.877
023.40.12501426107416013741126402612151214515039900.5121012.885580
024.40.1250141013.673
023.40.14001576122416015241272402613651364515039900.5121156.897650
024.40.1400141153.683
023.40.16001776142416017241476452615651564515039900.5141349.697750
024.40. 1600161350.485
023.40. 18001976162416019241676452617651764515039900.5141545.6111820
024.40.1800161542.497
023.50.200022151785190214918514833196519628178471200.5161702.41071150
024.50.2000181699.295
023.50.224024552025190238920914833220622028178471200.5161942.41221500
024.50.224018133.2108
023.50.250027152285190264923515633246524628178471200.5182203.21231700
024.50.2500202188110
023.50.280030152585190294926515633276527628178471200.5182491.21391900
024.50.2800202488125
023.60.315034282872226333829625645310431028214561500.52027681393300
024.60.3150222758.8126
023.60.355038283272226373833625645350435028214561500.52031681593700
024.60.3550223176.8145
023.60.4000
024.60.4000
427837222264188381260453954395210214561500.5223616.81654200
23600145
023.60.4500477842222264688431260454454445210214561500.5224122.81884700
024.60.4500254110165


Double row ball slewing bearing--- External gear(021/022 Series)

Bearing ModelDimensionsMounting DimensionsStructural DimensionGear dataweight  (kg)
DmmdmmHmmD1mmD2mmnφmmD3mmd1mmn1H1mmhmmbmmxMmmDemmz
021,25.500
022.25.500
616384106580420201852351849626600.55644126100
6646.8105
021.25.560676444106640480201858357849626600.55704138115
022.25.5606706.8115
021.25.630746514106710550241865364849626600.56790.8129130
022.25.6308790.496
021.25.710826594106790630241873372849626600.56862.8141140
022.25.7108862.4105
021.30.8009426581248987023022829823611429800.58982.4120200
022.30.8001098896
021.30.90010427581249988023022929923611429800.581086.4133250
022.30.900101088106
021.30.100011428581241098902362210291023611429800.5101198117300
022.30.1000121197.697
021.30.1120126297812412181022362211481143611429800.5101318129340
022.30.1120121317.6107
021.40.12501426107416013741126402612861282515039900.5121497.6122580
022.40.1250141495.2104
021.40.14001576122416015241272402614361432515039900.5121641.6134650
022.40.1400141649.2115
021.40.160017761241601724176452616361635515039900.5141845.2129750
022.40.1600
161852.8113
021.40.18001976162416019241676452618361835515039900.5142055.2144820
022.40.1800162060.8126
021.50.20002215178519024918514833203820358178471200.5162300.81411150
022.50.2000182300.4125
021.50.22402455202519023892091483327822758178471200.562540.81561500
022.50.2240182552.4139
021.50.250027152285190264923515633253825328178471200.5182804.41531700
022.50.2500202816138
021.50.2800
022.50.2800
30152585190294926515633283828328178471200.5183110.41701900
203116153
021.60.315034282872226333829625645319831968214561500.52035361743300
022.60.3150223537.6158
021.60.355038283272226373833625645359835968214561500.5203936943700
022.60.3550223933.6176
021.60.4000
022.60.4000
427837222264188381260454048404610214561500.5224395.61974200
25439513
021.60.4500477842222264688431260454548454610214561500.5224879.62194700
022.60.4500254895193


Double row ball slewing bearing--- No gear(020 Series)

Bearing ModelDimensionsMounting DimensionsStructural Dimensionweight  (kg)
DmmdmmHmmD1mmD2mmnφmmD3mmd1mmn1H1mmhmm
020.25.500616384106580420201848247749626100
020.25.560676444106640480201854253749626115
020.25.630746514106710550241861260749626130
020.25.710826594106790630241869268749626140
020.30.8009426581248987023022777771611429200
020.30.90010427581249988023022877871611429250
020.30.1000114285812410989023622977971611429300
020.30.1120126297812412181022362210971091611429340
020.40.12501426107416013741126402612151214515039580
020.40.14001576122416015241272402613651364515039650
020.40.16001776142416017241476452615651564515039750
020.40 18001976162416019241676452617651764515039820
020.50.200022151785190214918514833196519628178471150
020.50.224024552025190238920914833220622028178471500
020.50.250027152285190264923515633246524628178471700
020.50.280030152585190294926515633276527628178471900
020.60.315034282872226333829625645310431028214563300
020.60.355038283272226373833625645350435028214563700
020.60.4000427837222264188381260453954395210214564200
020.60.4500477842222264288431260454454445210214564700


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