The net axial force acting on bearing is zero in case of double helical gears while none zero in case of herringbone gears.

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Helical gears mounted on parallel shafts are called crossed helical gears.

asked Jan 25 in Machine Design by Carter (89.5k points)

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A pair of parallel helical gears consist of 15 teeth pinion meshing with a 40 teeth gear. The helix angle is 22⁰ and normal pressure angle 19⁰. The normal module is taken as 4mm. Calculate the transverse pressure angle in degrees.

asked Feb 2 in Machine Design by Carter (89.5k points)

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A pair of parallel helical gears consist of 15 teeth pinion meshing with a 40 teeth gear. The helix angle is 22⁰ and normal pressure angle 19⁰. The normal module is taken as 4mm. Calculate the pitch circle diameter of pinion.

asked Feb 2 in Machine Design by Carter (89.5k points)

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A pair of parallel helical gears consist of 15 teeth pinion meshing with a 40 teeth gear. The helix angle is 22⁰ and normal pressure angle 19⁰. The normal module is taken as 4mm. Calculate the dedendum circle diameter of the pinion.

asked Feb 2 in Machine Design by Carter (89.5k points)

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A pair of parallel helical gears consist of 15 teeth pinion meshing with a 40 teeth gear. The helix angle is 22⁰ and normal pressure angle 19⁰. The normal module is taken as 4mm. Calculate the pitch circle diameter of the gear.

asked Jan 27 in Machine Design by Carter (89.5k points)

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The teeth of the helical gears are cut parallel to the shaft axis.

asked Jan 27 in Machine Design by Carter (89.5k points)

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A pair of helical gears consist of 25 teeth pinion gear meshing with a 90 teeth gear. Calculate the material constant k If surface hardness is 260BHN.

asked Jan 27 in Machine Design by Carter (89.5k points)

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Crossed helical gears have very low load carrying capacity.

asked Jan 25 in Machine Design by Carter (89.5k points)

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A pair of parallel helical gears consist of 15 teeth pinion meshing with a 40 teeth gear. The helix angle is 22⁰ and normal pressure angle 19⁰. The normal module is taken as 4mm. Calculate addendum circle diameter of the pinion.

asked Jan 23 in Machine Design by Carter (89.5k points)

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A pair of helical gears consist of 25 teeth pinion gear meshing with a 90 teeth gear. Calculate the wear strength If surface hardness is 260BHN. Also face width=35mm, module=4mm and helix angle=25⁰.

asked Jan 23 in Machine Design by Carter (89.5k points)

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Herringbone gear can be used in

asked Jan 23 in Machine Design by Carter (89.5k points)

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A herringbone speed reducer consist of 20 teeth pinion driving a 100 teeth gear. The normal module of gear is 2mm. The face width of each half is 30mm and Lewis factor is 0.4. Calculate the material constant K if surface hardness is 400BHN.

asked Feb 2 in Machine Design by Carter (89.5k points)

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A herringbone speed reducer consist of 20 teeth pinion driving a 100 teeth gear. The normal module of gear is 2mm. The face width of each half is 30mm and Lewis factor is 0.4. If permissible bending stress is 500N/mm², then calculate the beam strength.

asked Jan 23 in Machine Design by Carter (89.5k points)

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A journal bearing is a ______ contact bearing working on the hydrodynamic lubrication and which supports load in____ direction.

asked Jan 27 in Machine Design by Carter (89.5k points)

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If centre distance between the two gears on same shaft is unequal to the centre distance on the other two gears on the second shaft, then this gear train is called reverted gear train.

asked Feb 2 in Machine Design by Carter (89.5k points)

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Below is a representation of a helical gear. Blue lines in the figure signify?

asked Jan 23 in Machine Design by Carter (89.5k points)

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There is same type of tooth meshing in helical and spur gear.

asked Jan 23 in Machine Design by Carter (89.5k points)

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The dynamic load carrying capacity of a bearing is defined as the radial load in radial bearings that can be carried for a minimum life of 1000 revolutions.

asked Jan 23 in Machine Design by Carter (89.5k points)

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Temperature rise in partial bearing is ____ than full bearing.

asked Jan 22 in Machine Design by Carter (89.5k points)

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The bearing characteristic number shown in the graph is directly proportional to the unit bearing pressure.

asked Jan 22 in Machine Design by Carter (89.5k points)

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Among spur gear and helical gear, which has smooth engagement and thus lesser noise?

asked Jan 23 in Machine Design by Carter (89.5k points)

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A single transverse weld is preferred over double transverse fillet weld.

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In cycloidal gears contact area is

asked Jan 23 in Machine Design by Carter (89.5k points)

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Is it possible to transmit power between shafts lying in different planes using gears?

asked Jan 23 in Machine Design by Carter (89.5k points)

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A rolling contact bearing is specified as X307. Determine the series.

asked Feb 2 in Machine Design by Carter (89.5k points)

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