Catalog 390 An engineering and product selection guide for Slewing Ring Bearings www.kaydonbearings.com

Conversion Factors English-Metric Metric-English 1 in = 25.4 mm 1 mm = .03937 in 1 ft = .3048 m 1 m = 3.281 ft 1 lb = 4.448 N 1 N = 0.2248 lb 1 ft-lb = 1.356 N-m 1 N-m = .7376 ft-lb 1 in-lb = .113 N-m 1 N-m = 8.851 in-lb 1 in-oz = 72.01 gf-cm 1 gf-cm = .01389 in-oz 1 lb = .4536 kg 1 kg = 2.205 lb 1 oz = 28.35 g 1 g = .03527 oz 1 psi = 6895 Pa (N/m2) 1 Pa = .000145 psi 1 ksi = 6.895 MPa (N/mm2) 1 MPa = .145 ksi (°F -32 ) /1.8 = °C 1.8 x °C + 32 = °F Length Force Torque/Moment Weight Stress / Pressure Temperature (rounded to 4 significant digits)

©Kaydon Corporation Issue 11 Slewing Ring Bearings Catalog 390 Slewing Ring Bearing Reference Guide Divisional Office 2860 McCracken Street Muskegon, MI 49441 +1 231.755.3741 tel +1 231.759.4102 fax Customer Service 800.514.3066 toll-free 1-800-514-3066 www.kaydonbearings.com 1

Introduction Introduction ©Kaydon Corporation Issue 11 Slewing Ring Bearings Catalog 390 Section 1 Kaydon® has been one of North America’s leading producers of large diameter ball and roller bearings since it was established in 1941, and is considered one of the pioneers of large bearing technology. Engineering Capability In addition to a range of catalog slewing ring bearings, Kaydon can provide a wide range of custom manufactured bearings to meet your specifications. Upon request, Kaydon’s experienced and knowledgeable professionals can provide engineering expertise and analysis in a wide...

Product Overview and Selection Guide Section 1 Introduction Slewing Ring Bearings Catalog 390 ©Kaydon Corporation Issue 11 RK Series HS HT MT & KH Series XT Series Design ❚❚ Four-Point Contact Ball ❚❚ Four-Point Contact Ball ❚❚ Four-Point Contact Ball ❚❚ Flanged cross-section on non-geared rings ❚❚ Rectangular cross-section ❚❚ Internal, external, and non-gear versions available from stock ❚❚ KH Series are preloaded with precision runouts ❚❚ Wide range of diameters and various crosssections ❚❚ External and non-gear versions available from stock ❚❚ More capacity potential than RK & MT Series...

Product Overview and Selection Guide Introduction ©Kaydon Corporation Issue 11 Slewing Ring Bearings Catalog 390 Section 1 DT Series XR Series TR Series Design ❚❚ Eight-Point Contact Ball ❚❚ Cross Roller ❚❚ Three-Row Roller ❚❚ Two matched rows of four-point balls ❚❚ Single row of rollers having alternating orientation ❚❚ Three independent rows of rollers, oriented for optimal performance ❚❚ Rectangular cross-section ❚❚ Greater stiffness and dynamic capacity than a four-point contact bearing ❚❚ Greatest stiffness and capacity for a given diameter ❚❚ Internal, external, or non-gear ❚❚...

Introduction Section 1 6 Slewing Ring Bearings Catalog 390 ©Kaydon Corporation Issue 11 Applications - Renewable Energy Wind & Solar www.kaydonbearings.com 1-800-514-3066

Applications - Medical Introduction ©Kaydon Corporation Issue 11 Slewing Ring Bearings Catalog 390 Section 1 Photo Courtesy of Varian Medical Systems 1-800-514-3066 www.kaydonbearings.com 7

Applications - Heavy Equipment Section 1 Introduction Slewing Ring Bearings Catalog 390 ©Kaydon Corporation Issue 11 8 www.kaydonbearings.com 1-800-514-3066

Introduction ©Kaydon Corporation Issue 11 Slewing Ring Bearings Catalog 390 Section 1 1-800-514-3066 www.kaydonbearings.com 9

Applications - Machinery Section 1 Introduction Slewing Ring Bearings Catalog 390 ©Kaydon Corporation Issue 11 FMC Jetway Apron Drive Passenger Boarding Bridge. © 2007 Photo by P. Michaud. Courtesy of FMC Technologies, Jetway. 10 www.kaydonbearings.com 1-800-514-3066

Applications - Military Introduction ©Kaydon Corporation Issue 11 Slewing Ring Bearings Catalog 390 Section 1 Image Courtesy of US Army. Image Courtesy of US Navy. Image Courtesy of US Army. Image Courtesy of US Army. 1-800-514-3066 www.kaydonbearings.com 11

©Kaydon Corporation Issue 11 Slewing Ring Bearings Catalog 390 Technical Information & Guide A bearing serves as a connection between two adjacent structures, allowing rotation and transmission of load between them. In addition to satisfying this requirement, a slewing ring bearing typically includes features for simple and quick attachment to those adjacent structures, and commonly a feature to facilitate the mechanical rotation of one ring and its adjoining structure relative to the other. ❚❚ Weights of all members of the structure which are supported by the bearing. Kaydon slewing ring...

Slewing Ring Bearings Catalog 390 ©Kaydon Corporation Issue 11 Section 2 Technical Information Technical Information & Guide Application information rolling elements within. The result is a lower stress level on all components involved in the transmission of the load. Load When the axial load is “suspended” from the bearing, it is concentrated predominantly in a smaller area around the bolts. This is a critical difference that must be considered in the design. See Figure 2-3. A slewing ring bearing can be designed for use in applications where loads originate from a single direction or...

©Kaydon Corporation Issue 11 Slewing Ring Bearings Catalog 390 Technical Information & Guide In most applications of large-diameter bearings, the force required to overcome bearing friction, or resistance to rotation, is small compared to that required to overcome the inertia of the mass being supported provided the bearing is properly mounted and contains the standard internal clearance. Bearings include a minimal amount of clearance to minimize the possibility of tight spots resulting from ordinary imperfections in the mounting. Refer to Section 3 for detailed discussion. A bearing...

Slewing Ring Bearings Catalog 390 ©Kaydon Corporation Issue 11 Section 2 Technical Information Technical Information & Guide bearing is required to reduce friction and wear, provide corrosion protection, displace contaminants, and enhance performance of the seals. One or more grease fittings or lubrication holes are provided in all slewing ring bearings for this purpose. Additional lube fittings or holes may be required and can be furnished on request. Whenever the slewing ring bearing has an integral gear, it too requires periodic application of grease for optimum performance. For further...