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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

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

No gear
Kaydon part number	Load chart	Outline dimensions & weight							Mounting holes				Gear data inv. stub, α = 20°			Max gear tooth load F_z (lbs)	Moment rating C_rm (ft-lbs)
		D_o (in)	d_i (in)	D_r (in)	D_i (in)	d_o (in)	d_r (in)	G approx. (lbs)	Outer ring		Inner ring		Gear data inv. stub, α = 20°
		D_o (in)	d_i (in)	D_r (in)	D_i (in)	d_o (in)	d_r (in)	G approx. (lbs)	L_o (in)	n_o	L_i (in)	n_i	D₂ (in)	P_d	z₂
RK6-16P1Z		20.390	11.970	17.870	16.220	16.140	14.490	58	19.250	8	13.130	12	-	-	-	-	22,700
RK6-22P1Z		25.510	17.090	22.990	21.340	21.260	19.610	76	24.380	12	18.130	15	-	-	-	-	37,700
RK6-25P1Z		29.450	21.030	26.930	25.280	25.200	23.550	89	28.380	12	22.130	18	-	-	-	-	49,800
RK6-29P1Z		33.390	24.970	30.870	29.220	29.140	27.490	104	32.250	15	26.130	18	-	-	-	-	54,200
RK6-33P1Z		37.320	28.900	34.800	33.150	33.070	31.420	118	36.250	18	30.000	18	-	-	-	-	56,500
RK6-37P1Z		41.260	32.840	38.740	37.090	37.010	35.360	132	40.130	18	34.000	20	-	-	-	-	65,200
RK6-43P1Z		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

Internal gear
Kaydon part number	Load chart	Outline dimensions & weight							Mounting holes				Gear data inv. stub, α = 20°			Max gear tooth load F_z (lbs)	Moment rating C_rm (ft-lbs)
		D_o (in)	d_i (in)	D_r (in)	D_i (in)	d_o (in)	d_r (in)	G approx. (lbs)	Outer ring		Inner ring		Gear data inv. stub, α = 20°
		D_o (in)	d_i (in)	D_r (in)	D_i (in)	d_o (in)	d_r (in)	G approx. (lbs)	L_o (in)	n_o	L_i (in)	n_i	D₂ (in)	P_d	z₂
RK6-16N1Z		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		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		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		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		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		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		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

External gear
Kaydon part number	Load chart	Outline dimensions & weight							Mounting holes				Gear data inv. stub, α = 20°			Max gear tooth load F_z (lbs)	Moment rating C_rm (ft-lbs)
		D_o (in)	d_i (in)	D_r (in)	D_i (in)	d_o (in)	d_r (in)	G approx. (lbs)	Outer ring		Inner ring		Gear data inv. stub, α = 20°
		D_o (in)	d_i (in)	D_r (in)	D_i (in)	d_o (in)	d_r (in)	G approx. (lbs)	L_o (in)	n_o	L_i (in)	n_i	D₂ (in)	P_d	z₂
RK6-16E1Z		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		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		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		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		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		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		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

Mating pinions

Bearing
part
number

Pinion
part
number

Gear data (α = 20°)

Outline dimensions & weight

Tooth
form

z₁

P_d
(in)

b₁
(in)

L₁
(in)

D₁
(in)

D_o1
(in)

D_r1
(in)

D_i1
(in)

w
(in)

G
approx.
(lbs)

RK6-16 thru
RK6-29

39200001
39200002

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

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

Ref.

+.000
-.010

Ref.

+.002
-.000

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 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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