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Kaydon slewing bearings

RK series

Kaydon RK series slewing ring bearings provide a wide variety of solutions for applications where a large diameter and lighter weight are key. RK series slewing rings have a flanged cross-section on one or both rings that reduces weight and provides the equipment designer with Kaydon's unique flexibility, accommodating various configurations of adjacent mounting structures and bolting arrangements.
 

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Specifications

 
No gear
Internal gear
External gear
Mating pinions
Notes & related items

 
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Kaydon Bearings - RK turntable 3D

Design features
The internal configuration is a deep-groove gothic arch raceway, which provides four points of contact with the balls, enabling the bearing to simultaneously carry radial, axial, and moment loads. The use of spacer balls alternated with load balls allows for lower rotational torque and superior performance in applications involving oscillatory movement. Integral face riding bearing seals are provided to assist in the exclusion of contaminants.

RK series slewing bearings are offered in nongeared, internally geared, and externally geared configurations for maximum design flexibility. The gears are involute stub designs with 20° pressure angles, manufactured to AGMA Class Q5 quality and 0.005 to 0.015 inches allowance for backlash. RK series turntable bearings range in size from 20–47 inches OD (500–1200 mm OD).

Availability
RK series slewing ring bearings are generally available from stock, and mating pinions for the geared versions are also generally available.

Applications
RK series slewing ring bearing solutions have been used successfully in a variety of light- to medium-duty applications including:

  • Small cranes, booms, and lifts
  • Industrial positioners and rotary tables
  • Chute swivels
  • Stretch wrapping machines
  • Bottle filling machines
  • Conveyors and related material handling equipment
  • Rotating displays

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See glossary of symbols

 Kaydon Bearings - RK series turntable profile - no gear
No gear
Kaydon
part
number		 Load
chart		 Outline dimensions & weight Mounting holes Gear data
inv. stub, α = 20°		 Max
gear
tooth
load
Fz
(lbs)		 Moment
rating
Crm
(ft-lbs)
Do
(in)		 di
(in)		 Dr
(in)		 Di
(in)		 do
(in)		 dr
(in)		 G
approx.
(lbs)		 Outer ring Inner ring
Lo
(in)		 no Li
(in)		 ni D2
(in)		 Pd z2
RK6-16P1Z load chart 20.390 11.970 17.870 16.220 16.140 14.490 58 19.250 8 13.130 12 - - - - 22,700
RK6-22P1Z load chart 25.510 17.090 22.990 21.340 21.260 19.610 76 24.380 12 18.130 15 - - - - 37,700
RK6-25P1Z load chart 29.450 21.030 26.930 25.280 25.200 23.550 89 28.380 12 22.130 18 - - - - 49,800
RK6-29P1Z load chart 33.390 24.970 30.870 29.220 29.140 27.490 104 32.250 15 26.130 18 - - - - 54,200
RK6-33P1Z load chart 37.320 28.900 34.800 33.150 33.070 31.420 118 36.250 18 30.000 18 - - - - 56,500
RK6-37P1Z load chart 41.260 32.840 38.740 37.090 37.010 35.360 132 40.130 18 34.000 20 - - - - 65,200
RK6-43P1Z load chart 47.170 38.750 44.650 43.000 42.920 41.270 153 46.000 18 39.880 24 - - - - 75,500
Tolerances   ±.040 ±.040 +.000
-.080		 Ref. Ref. +.080
-.000		                    

See glossary of symbols

 Kaydon Bearings - RK series turntable profile - internal gear
Internal gear
Kaydon
part
number		 Load
chart		 Outline dimensions & weight Mounting holes Gear data
inv. stub, α = 20°		 Max
gear
tooth
load
Fz
(lbs)		 Moment
rating
Crm
(ft-lbs)
Do
(in)		 di
(in)		 Dr
(in)		 Di
(in)		 do
(in)		 dr
(in)		 G
approx.
(lbs)		 Outer ring Inner ring
Lo
(in)		 no Li
(in)		 ni D2
(in)		 Pd z2
RK6-16N1Z load chart 20.390 12.850 17.870 16.220 16.140 - 65 19.250 8 14.880 12 13.250 4 53 6,800 22,700
RK6-22N1Z load chart 25.510 17.600 22.990 21.340 21.260 - 90 24.380 10 19.630 15 18.000 4 72 6,530 37,700
RK6-25N1Z load chart 29.450 21.600 26.930 25.280 25.200 - 106 28.380 12 23.630 18 22.000 4 88 6,400 49,800
RK6-29N1Z load chart 33.390 25.600 30.870 29.220 29.140 - 121 32.250 15 27.630 18 26.000 4 104 6,300 54,200
RK6-33N1Z load chart 37.320 29.133 34.800 33.150 33.070 - 148 36.250 18 31.500 18 29.667 3 89 8,520 56,500
RK6-37N1Z load chart 41.260 33.133 38.740 37.090 37.010 - 165 40.130 18 35.500 20 33.667 3 101 8,420 65,200
RK6-43N1Z load chart 47.170 39.133 44.650 43.000 42.920 - 188 46.000 18 41.500 24 39.667 3 119 8,340 75,500
Tolerances   ±.040 +.030
-.000		 +.000
-.080		 Ref. Ref. Ref.                    

See glossary of symbols

 Kaydon Bearings - RK series turntable profile - external gear
External gear
Kaydon
part
number		 Load
chart		 Outline dimensions & weight Mounting holes Gear data
inv. stub, α = 20°		 Max
gear
tooth
load
Fz
(lbs)		 Moment
rating
Crm
(ft-lbs)
Do
(in)		 di
(in)		 Dr
(in)		 Di
(in)		 do
(in)		 dr
(in)		 G
approx.
(lbs)		 Outer ring Inner ring
Lo
(in)		 no Li
(in)		 ni D2
(in)		 Pd z2
RK6-16E1Z load chart 19.900 11.970 - 16.220 16.140 14.490 72 18.000 8 13.130 12 19.500 4 78 5,560 22,700
RK6-22E1Z load chart 25.150 17.090 - 21.340 21.260 19.610 96 23.250 12 18.130 15 24.750 4 99 5,650 37,700
RK6-25E1Z load chart 29.150 21.030 - 25.280 25.200 23.550 115 27.250 15 22.130 18 28.750 4 115 5,700 49,800
RK6-29E1Z load chart 32.900 24.970 - 29.220 29.140 27.490 128 31.000 18 26.130 18 32.500 4 130 5,740 54,200
RK6-33E1Z load chart 37.200 28.900 - 33.150 33.070 31.420 152 35.000 18 30.000 18 36.667 3 110 7,580 56,500
RK6-37E1Z load chart 41.200 32.840 - 37.090 37.010 35.360 172 38.880 18 34.000 20 40.667 3 122 7,620 65,200
RK6-43E1Z load chart 46.867 38.750 - 43.000 42.920 41.270 189 44.630 20 39.880 24 46.333 3 139 7,680 75,500
Tolerances   +.000
-.030		 ±.040 Ref. Ref. Ref. +.080
-.000		                    

See glossary of symbols

 Kaydon Bearings - RK series turntable profile - mating pinions
Mating pinions
Bearing
part
number		 Pinion
part
number		 Gear data (α = 20°) Outline dimensions & weight
Tooth
form		 z1 Pd
(in)		 b1
(in)		 L1
(in)		 D1
(in)		 Do1
(in)		 Dr1
(in)		 Di1
(in)		 w
(in)		 G
approx.
(lbs)
RK6-16 thru
RK6-29		 39200001
39200002		 SD 14
17		 4
4		 2.000
2.000		 2.880
2.880		 3.500
4.250		 3.900
4.650		 2.880
3.630		 1.000
1.000		 1/4 6.4
10.0
RK6-33 thru
RK6-43		 39200003
39200004		 SD 14
17		 3
3		 2.000
2.000		 2.880
2.880		 4.667
5.667		 5.200
6.200		 3.880
4.880		 1.250
1.250		 5/16 11.4
18.3
Tolerances     Ref. ±.015 ±.015 Ref. +.000
-.010		 Ref. +.002
-.000		    

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Notes
Damage to equipment and danger to human life can result from failure to heed the recommendations in the text identified by the warning symbol in Kaydon Catalog 390 where further details and additional considerations can be found.

Related pages
Slewing ring bearing selector
Turntable glossary of symbols

Related downloads
Catalog 390: RK series (Adobe PDF)
Catalog 390: RK series mating pinions (Adobe PDF)
Catalog 390: all pages (Adobe PDF)

Adobe Acrobat Reader

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