Crane Duty Helical Gearboxes
1. Product description
Conceptï¼?QJ series crane duty helical gearbox is suitable for crane operation mechanism, also widely used in transportation, metallurgy, mining, chemical industry, light industry and other mechanical equipment transmission machinery.
Material of gears and bearings:20CrMnTi/40Cr/42CrMo
Hardness of gears and bearings:58~62 HRC/217~255HB
Gear handling method:Carburizing and quenching treatment
2. Characteristics
 1). Wide range of deceleration ratio, nominal speed ratio 10-200
 2). High efficiency of mechanical transmission, 96% in the second level and 94% in the third level.
 3). Smooth operation and low noise
 4). Because 42CrMo and 35CrMo are forged and tempered to make gear shafts and gears respectively, their service life is long.
 5). Easy to disassemble and install.
 6). Small size and light weight
 7). Use multi-series to reduce single-stage speed ratio. It can open the center distance, reduce the whole height of reducer, and meet the requirements of crane agencies.
3.Applicable Conditions
1). Gear circumferential velocity not more than 20m/s
 2). Speed of high speed shaft is not more than 1500r/min
 3). The working environment temperature is - 40â??- 45â??.
 4). It can operate in both positive and negative directions.
4. Model and Speed Ratio
 Model  Speed ratio
QJR/QJR-D Â 10/12.5/16/20/25/31.5
QJS/QJRS/QJS-D/QJRS-DÂ Â 40/50/63/80/100/125/160/200
5.Sign and order symbolÂ
Example:QJS type crane duty helical gearbox QJS3560-50-III-CW.
Note:three-stage transmission of crane reducer, nominal center distance A1 = 560mm, nominal transmission ratio 50. Assembly type III, output shaft end of gear, horizontal installation.
6. Packaging & Delivery
Packing details: To be packed in wooden cases.
Loading Port: Shanghai or Ningbo,China
Delivery time: Within 25-35Â working days after we have received the full payment.Â
7. Our advantageÂ
 We can understand the drawing with tolerance,material and process way correctly.and we have experienced and professional team control the quality.
8. Supply Ability
   3000 set per Month.Â
9. Our service
 l Quick and safe delivery .
 l ISO certificate .
 l More than 10 years reducer and motor sale experience .
 l Chinese motor and reducer golden supplier .
 l Good after-sales service .
 l 1 year warranty period .
Supplier: Crane Duty Gearbox
Crane & Hoist Duty Motors : Siemens,Bharat Bijlee, ABB, Havells, Crompton Induction Motors by# Kw # Pole # Efficiency # Voltage # Frequency # Crane Motors # Crompton High voltage Crane & Hoist Duty Motors# # Bharat Bijlee Crane & Hoist Duty Motors # Saudi Arabia # Oman # Qatar # Yemen # Dubai # Electricals # Electric # U.S.A # China
Hk series heavy duty helical gearboxes 1. Moq: 1 set 2. Packing method: polywood 3. Delivery lead time: 20-25 days 4. Payment terms: fob, cif, ddp 5. Payment method: t/t, 30% in advance, 70% before delivery 6. Shipping port: shanghai Material: Housing: ht250 cast iron Gear: 20crmnti h, high grade allo with carburization, surface hardness: 58-62hrc, center hardness: 33-48hrc Grinding precision grade: iso1328-1: 1995 class 5-6, surfaceness: 0.8, carburization depth: 0.6-1.5mm Bearing: 42crmo Warranty: 18 months Applications: The products are widely applied in electricity, coal, cement, metallurgy, harbor, agriculture, shipping, lifting, environment protection, stage, logistic, weaving, paper making, light industry, plastics and other regions. Fumigation case, weight and dimensions depend on gearbox size
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Flange-mounted with hollow shaft, foot-mounted with hollow shaft, and can be added torque arm and other special accessories. Large strength, long-term usage Usage: can be combined with various motors for larger transmission rate Carburized gears are durable and highly accurate High overload capacity and reduced noise Transmission ratios are finely classified with millions of different combinations to meet the different requirements of the customers. Input power 0.12 - 200 kw Ratio 5.36-17550 Output torque up to 50000 n. M. Wood/carton
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