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  1. coss

    Fan Shaft Braking Device

    This design involves adding Differential Holdback Band Brakes on 4" Steel SAE 1040 Shafts in which three high-strength A490 bolts will be used to attach a 3/4" thick, 8" Diameter steel plate to the non-drive side of the shafts instead of a coupling because only about 1/4" of...
  2. coss

    Fan Shaft Braking Device

    This design involves adding Differential Holdback Band Brakes on 4" Steel SAE 1040 Shafts in which three high-strength A490 bolts will be used to attach a 3/4" thick, 8" Diameter steel plate to the non-drive side of the shafts instead of a coupling because only about 1/4" of...
  3. coss

    Steel Shaft Design Safety Factors

    Would like advice on reasonable value for Factor of Safety on a 15' long Steel SAE 1040 Fan Shaft on a 200,000 CFM Fan with a 250 hp Motor driven by a VFD. Fan Sheave is 1,000 lb. ,10 V-belt , 40" Diameter, and the Wheel is 7,000 lb. , 89" Diameter. Shaft is 35 years old and was...

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