Basic Information Selection Guide M451-110, August 2002 - Rexnord

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F A L K Types G52 & GV52 The Type G52 single engagement design is used with floating shafts or three bearing drive trains. It has one flex half and one rigid half and only accepts angular misalignment. (See Page 19.) The GV52 vertical single engagement gear coupling is a standard horizontal single engagement gear coupling modified to accommodate the sleeve centering assembly. It recommended for inclinations over 10°. Downward thrust capacity for Sizes 1010 thru 1030GV52 is 1 130 Nm; Sizes 1035 thru 1070GV52 is 3 390 Nm and Sizes 1080GV52 and larger is 9 830 Nm. (See Pages 23 & 44.) Floating shaft assemblies are used when distance between equipment is too great for spacer couplings. A standard floating shaft assembly consists of two standard single engagement couplings, two gap discs and a connecting shaft. A floating shaft can eliminate the need for additional bearing supports along spanning shafts because the shaft is supported by connected equipment through the single engagement couplings. (See Pages 21 and 42.) When used with a vertical floating shaft on inclinations over 10°, the Type GV52 coupling is used as the lower coupling to support the shaft. Flex Hubs on Floating Shaft (RFFR) — Assembly of the flex hubs on the floating shaft allows for easier replacement and allows the rigid hubs with greater bore capacity to be used on the connected equipment shafts. This frequently means a smaller coupling size can be utilized. Rigid Hubs on Floating Shaft (FRRF) — When the rigid hubs are on the floating shaft, shorter shaft spans can be accommodated, since no cover drawback is required. Types G52 & GV52 Floating Shaft Double or single engagement brakewheel and disc brake couplings are used for applications, such as cranes, hoists and conveyors. Brakewheel and disc brake couplings accommodate misalignment between connected equipment and eliminate the need for double shaft extensions on motors and gear drives for applications requiring brakes. (See Pages 24 & 25.) Types G62 & 66 Type G63 Double and single engagement Slide couplings are used for applications requiring axial movement to accommodate thermal shaft expansion or adjustment. (See Pages 26 & 27.) Types GL20 & GL52 8 (M451-110) The Falk Corporation, 1998, 2002.
Type G70 Disconnect couplings are used for low speed applications that require quick disconnect of equipment or inching drives. It is used for occasional servicing or inspection of drive system components and is most commonly used on portable or stationary inching drive systems where the driving end hub/sleeve combination is mounted on the driving shaft on the incher for connecting or disconnecting at standstill. (See Page 28.) Type G72 Disconnect couplings were designed for higher speed applications that require quick disconnect such as backup drives. When the long flex hub is mounted on the auxiliary driving shaft, the changeover is performed at standstill by engaging the free running hub. (See Page 29.) Types G70 & G72 INSULATOR PLATE Double, single or rigid engagement insulated couplings are used to eliminate the flow of stray current from one shaft to another and to protect sensitive electrical equipment. They are not intended to withstand high potential currents, short circuits or static charges. Insulated couplings consist of standard hubs and sleeves, and utilize reduced diameter socket head cap screws. The insulator plate is made of a NEMA Grade LE phenolic material and insulator bushings and washers are made of NEMA Grade G9 phenolic material. (See Page 30.) Types GP20, GP52 & GP82 Rigid couplings are used when there is no need to accommodate misalignment, and where thrust loads are generated such as vertical mixer applications. (See Pages 31 and 32.) The Type G Large Gear Coupling is available in all types for capacities up to 8,185,000 Nm, (72,450,00 lb-in. (See Page 40.) Type G82 & GV82 SHEAR PLATES HARDENED BUSHING SHEAR PIN Shear pin couplings are used for applications subject to jamming and overload. When pins break, the equipment is physically disconnected preventing damage. If desired shear settings are unknown, the selection should be referred to Falk. (See Page 33.) SHEAR NOTCH DIAMETER Type GR20 The Falk Corporation, 1998, 2002. (M451-110) 9
Page 1 and 2: Selection Guide M451-110, August 20
Page 3: Lifelign Gear Coupling Types With t
Page 7 and 8: How to Select Formula Selection Met
Page 9 and 10: SERVICE FACTORS: are a guide, based
Page 11 and 12: Type GC05 Continuous Sleeve Single
Page 13 and 14: Type G20 Standard Flanged Sleeve Do
Page 15 and 16: Type G52 Standard Flanged Sleeve Si
Page 17 and 18: Type G52 Standard Flanged Sleeve Fl
Page 19 and 20: Type GV52 Standard Flanged Sleeve V
Page 21 and 22: Types G62/G66 Standard Flanged Slee
Page 23 and 24: Type GL52 Standard Flanged Sleeve S
Page 25 and 26: Type G72 Disconnect/Dimensions —
Page 27 and 28: Type G82 Standard Flanged Sleeve Ri
Page 29 and 30: Type GR20 Standard Flanged Sleeve S
Page 31 and 32: Engineering Data — Standard Flang
Page 37 and 38: Type G52 Large Flanged Sleeve Singl
Page 39 and 40: Type GV20 Large Flanged Sleeve Vert
Page 41 and 42: Type GL20-4 Large Flanged Sleeve Sl
Page 43 and 44: Type G82 Large Flanged Sleeve Rigid
Page 45 and 46: Engineering Data — Large Flanged
Page 51 and 52: Engineering Data — All Gear Coupl
Page 53 and 54: Interchange Guide — Continuous Sl
Page 55 and 56:
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Basic Information Selection Guide M451-110, August 2002 - Rexnord

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