Group: Cross and Morse
Catalog excerpts
Bevel and Mitre Gears Design and Selection The power steel bevel gears can transmit under ideal lubrication conditions is normally limited by wear life. The following tables give design power in kW for a normal operating life of 10,000 hours for stock gears. For increased life gears can be induction hardened. From details of Driver and Driven equipment select correct Service Factor from table below. 2. Calculate Design Power kW Design Power = Actual Power Service factor. 3. If Drive ratio not available determine from R.P High Speed Shaft .M. Ratio = R.P Low Speed Shaft .M. 4. From table for Drive Ratio (i.e. 1:1 Mitre Gear, 1.5:1 to 4:1 Bevel Gears), select smallest gearset where Power equals or exceeds Design power at Pinion R.P For variable speed .M. drives check selection at max. shaft speed, torque and power. For useful formulae on Bevel Gears design refer to appendix pages. All mitre and bevel gears develop end thrust which must be counteracted by bearings of adequate capacity. Accurate and rigid mounting of both gear and pinion provide quiet operation and long life. Bearing spacing and shaft stiffness should be selected to keep shaft deflection below .025mm. Grease lubrication can be adequate for low speed applications but oil splash lubrication is always preferable. The oil level should cover the face of the lower gear, and sufficient capacity should be available to keep oil temperature below 95˚C. Design Factors Character of Load of Driven Equipment Power Source Power Rating Tables Standard Metric Mitre Gears Heavy Shock Uniform Light Impulse Heavy Impulse For speed increase drives add 0.1 to above factors. Selections in tinted area have pitch line velocity over 5 m/s. For these selections it is recommended teeth are induction hardened. When correctly aligned, a bevel gearset with oil lubrication can operate with transmission efficiency up to 98 per cent. For correct selection of a Bevel Gearset first assemble application data, including Power, shaft speeds and drive ratio required. Bevel gears of identical pitch and teeth but from different drive ratio gearsets are not interchangeable. All bevel gears are generated on the pitch cone radius which varies with the ratio of gears within a given diametral pitch. Bevel and Mitre Gears are used to transmit power between shafts intersecting at 90˚, on low speed, high torque applications where pitch line velocity does not exceed 5 m/s. All Cross+Morse gears are cut to the Gleason System to provide equal strength between pinion and gear.
Open the catalog to page 1Bevel and Mitre Gears Power Rating Tables - Standard Metric Bevel Gears Gear Speed R.P .M. 10 Power Rating Tables - Imperial Series D.P. Stock Bevel and Mitre Gears Pinion Speed R.P .M. 10 Selections in tinted area have pitch line velocity over 5 m/s. For these selections it is recommended teeth are induction hardened.
Open the catalog to page 2Standard D.P. Mitre and Bevel Gears A Standard D.P. Mitre Gears All gears cut 20˚ pressure angle material - 080M40 Imperial Series Mitre Gears 16 D.P. to 5 D.P. Catalogue No. All gears cut 20˚ pressure angle material - 080M40 Standard D.P. Bevel Gears Imperial Series Bevel Gears 16 D.P. to 6 D.P. D.P . Bevel Gear Sets 2:1 Ratio 161530 Bevel Gear Sets 3:1 Ratio 161236 All Gears Stocked with Standard Plain Bore. Rebore, Keyway, Setscrew and Induction Hardening Services available. Bevel and Mitre Gears with other D.P and Module can be supplied to order up to 375mm diameter. .
Open the catalog to page 3Standard Metric Mitre Gears A Standard Metric Mitre Gears Manufactured in medium carbon steels for high strength and durability. All gears cut 20 degree pressure angle. Cross+Morse standard stock metric mitre gears complement the existing range of diametral pitch gears to provide the designer a wider range of selection. The mitre gear sets are available in 7 tooth sizes in 9 pitches from 1.0 Mod to 5.0 Mod, providing the correct solution for right angle drives in applications from light instrumentation and office equipment to heavy manufacturing machinery. All gears are manufactured in...
Open the catalog to page 4Standard Metric Series Bevel Gears Cross+Morse standard stock bevel gears complement the existing range of diametral pitch gears to provide the designer a wider range of selection. Available in 4 standard ratios with 9 different pitches ranging from 1.0 Mod to 5.0 Mod, these bevels provide the ideal solution for many right angle drive applications from light instrumentation to rugged manufacturing plant and agricultural equipment. All gears are manufactured in medium carbon steels for high strength and durability, and can be optionally induction/flame hardened for more arduous applications....
Open the catalog to page 5Standard Metric Bevel Gears Pitch Module Bevel Gear Sets 3 : 1 Ratio M101545 Metric Series Bevel Gears 1.0 Mod to 5.0 Mod Bevel Gear Sets 4 : 1 Ratio 1 All dimensions in mm. All gears stocked with standard plain bore. Rebore, keyway, setscrew and induction hardening services available. Bevel and mitre gears with other D.P and module can be supplied to order up to 375mm diameter. .
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