Bonfiglioli RAN 28/DA HS 0.S. Right Angle Gear Unit
Product Overview
The Bonfiglioli RAN 28/DA HS 0.S. is a right angle gear unit intended for industrial power transmission. The model reference identifies a 1:1 ratio, a 150 Nm torque class, and three shafts with 28 mm diameter. The right angle arrangement allows torque to be transmitted between shafts that are not in line, supporting compact machine layouts.
The unit is used in conveyors, mixers, processing equipment, and general machinery where a right angle drive is required. Correct selection depends on input speed, output torque, shaft connections, duty cycle, mounting position, and environment. The gear unit should be installed by qualified personnel and according to technical documentation.
Construction and Mechanical Design
The right angle gear unit contains a housing, gear stages, shafts, bearings, and sealing elements. The housing supports the bearing arrangement and protects internal parts from contamination. Seals retain lubricant and reduce the entry of dust and moisture. The three shaft arrangement must match the machine connections and the direction of power flow.
Installation requires a clean and rigid mounting surface. The unit should seat without distortion. Fasteners must be tightened to the specified torque and checked after initial operation. Shaft connections should be aligned carefully. Couplings and transmission elements must be fitted with suitable tools and without impact.
Ratio and Load Planning
The 1:1 ratio means that input and output speed are equal in the basic arrangement, while the right angle layout changes the direction of transmission. The designer should confirm the torque flow and shaft functions. The 150 Nm torque class should be checked against starting torque, peak torque, and shock loads.
The three 28 mm shafts must be matched to couplings, pulleys, or other transmission elements. Excessive overhung load can affect bearing life. The gear unit should not be operated beyond its rated torque or speed. If the machine process changes, the drive train should be reviewed.
Installation and Commissioning
Before installation, the gear unit should be inspected for damage and the identification details checked. The shafts and mounting surfaces should be clean. Alignment with the motor and driven machine should be verified. Guards should protect rotating parts. The installation should provide access for lubrication checks and maintenance.
Commissioning should begin with a low load run where possible. Rotation direction, noise, vibration, leakage, and temperature should be checked. Fasteners should be rechecked after initial operation. The lubricant level should be confirmed according to the mounting position.
Lubrication and Thermal Conditions
Lubrication reduces friction and wear and helps remove heat from the gear mesh and bearings. The specified lubricant type and quantity must be used. The mounting position determines the correct oil level and plug arrangement. Fill, level, and drain points should remain accessible.
Operating temperature should remain within the intended range. The housing should have adequate air flow. Excessive temperature can indicate overload, incorrect lubricant, or inadequate cooling. Leakage should be corrected because low lubricant level can damage gears and bearings.
Operation and Monitoring
During operation, the gear unit should run smoothly within the designed speed and torque range. Operators should monitor noise, vibration, temperature, and leakage. A change in running sound can indicate wear or lubrication problems. Vibration can result from coupling issues, loose fasteners, or bearing damage.
Load changes can affect gear unit life. Increased throughput, higher torque, frequent reversing, or shock loading should be reviewed against the original selection.
Protection and Maintenance
Reliability depends on correct mounting, suitable lubrication, and protection from contamination. Seals should be inspected for damage. The gear unit should not be exposed to water, dust, or corrosive substances beyond its intended protection level.
Maintenance should include periodic inspection of lubricant, seals, fasteners, and housing condition. Before service, the machine must be isolated and secured against rotation.
Integration and Selection Summary
The RAN 28/DA HS 0.S. gear unit can be integrated into industrial machines that require right angle power transmission with a 1:1 ratio.
Selection should confirm the model RAN 28/DA HS 0.S., 1:1 ratio, 150 Nm torque class, three 28 mm shafts, mounting position, and lubrication requirements. The designer should verify compatibility with the motor and driven machine.
