HF41 Sheave/Hollow Shaft Mount Hollow shaft input, sheave output, for horizontal mounting. For all sizes below, a specially manufactured sheave is supplied by the Factory. Size 1420HF is secured to the motor shaft by a collet/collet draw bolt. Sizes 1480HF & 1584HF are secured to the motor shaft by an axial retention fastener, the hollow shaft is bored to the order and includes modified transitional fit, no setscrew, motor shaft end must be drilled and tapped for retention fastener, and coupling includes Factory-furnished spacer (spacer to length by the Factory, based on actual shaft engagement dimension provided by customer). Availability by Coupling Size & Type Type HFN41 HFD41 FILLER/FUSIBLE PLUG 392°F (200°C) N TYPE HFN WRENCH FL ATS K L SHEAVE (BY FALK) TYPE HFN N SHEAVE (BY FALK) Description Non Delay Fill Delay Fill 1420 X X FILLER/FUSIBLE PLUG 392°F (200°C) 1480 X X IA FASTENER 1584 X X QA SE SHAFT COLLET DRAW BOLT ENGAGEMENT AA COLLET (PAGE 32) SE MAXIMUM SHAFT ENGAGEMENT MINIMUM SHAFT ENGAGEMENT AA D TYPE HFD BA DRAIN/FUSIBLE PLUG 284°F (140°C) Size 1420 Predesigned Sheaves for Size 1420HF41 Part Number 0428352 0428231 0428353 0428162 Dimensions (in) Cplg Size ➀ 1420HF 1480HF 1584HF Cplg Weight No Bore & w/o Sheave, Fluid (lb) HFN – 159 276 HFD 168 172 295 Allowable Speed RPM 1800 1800 1800 Max Bore Cplg Size 1420HF 1480HF 1584HF Min Bore 1.875 ➃ 2.062 2.250 Square Key 3.000 3.750 4.000 Rectangular Key ➄ 3.375 4.125 4.375 Input 663 1,230 2,840 Type HFN Output 2,460 4,440 9,910 D – – – G 6.74 8.07 8.07 N 4.71 2.99 2.91 AA 18.70 21.65 26.38 BA 19.25 19.80 21.30 WR2 (lb-in2) ➅ Fluid @ Max Fill 820 1,504 3,844 Input 663 1,230 2,840 Type HFD Output 2,529 4,615 10,080 Fluid @ Max Fill 990 1,980 4,955 ➀ Fluid couplings are offered for horizontal mounting as shown. Refer to the Factory for other mounting arrangements. Dimensions are for reference only, and are subject to change without notice unless certified. ➁ Size 1420HF, see page 29 for dimensions K, L, and SE (Max). ➂ The preferred engagement between the driving shaft and the hollow bore is twice the diameter of the driving shaft. ➃ Minimum bore is the smallest bore to which the collet will be bored. Standard collets (see page 29). Refer to the Factory for non-standard collets. ➄ To use these maximum bores, a customer-furnished rectangular key must replace the standard square key that was supplied with the shaft. NOTE: Check key stresses. ➅ Equivalent mass moment values shown apply only to the fluid coupling (without bore) and sheave. Refer to page 29, Engineering Data, for fluid WR2 multipliers for other than maximum fill. 28 (521-110) NOTE: Dimensions subject to change. Certified dimensions of ordered material furnished on request. Fastener Size – 7/8-9 UNC 1-8 UNC IA Engagement) – 8.25 10.00 (Max Shaft QA SE ➂ (Min) 4.38 ➁ 5.62 6.25 G TYPE HFD BA DRAIN/FUSIBLE PLUG 284°F (140°C) Size 1480 & 1584 G Description 9.75" OD, 5V-5 groove 9.75" OD, 5V-8 groove 11.8" OD, 5V-5 groove 11.8" OD, 5V-10 groove
