* THIS VALUE IS MEASURED AT AN ENVIRONMENTAL TEMPERATURE OF 25°C AND INPUT SPEED OF 3000 RPM – IF THE NOMINAL SPEED OF THE GEARBOX IS OVER 3000 RPM THEN THIS VALUE IS MEASURED BY THAT SPECIFIC NOMINAL INPUT SPEED 79 TEL: 01827 288122 sales@wmh-trans.co.uk FAX: 01827 253390 www.wmh-trans.co.uk Glossary 10 APEX DYNAMICS, INC. Glossary rpm rpm Max. Input Speed n1B Efficiency % Operating Temperature º C Lubrication dB(A) Nominal Input Speed n1N Running Noise Emergency Stop Torque T2NOT Max. Acceleration Torque T2B The Emergency Stop Torque is the maximum permitted torque at the output of gearbox. This may happen only occasionally and may not exceed 1,000 times during the whole service life. Under the Cyclic Operation (S5), the Max. Acceleration Torque is the maximum torque which can be transmitted only briefly to the output of gearbox up to 1,000 cycles/hr. No Load Running Torque The No Load Running Torque is the min. torque to overcome the internal friction of a gearbox without loading*. The Nominal Input Speed is the permitted input speed of gearbox by the Continuous Operation (S1) while the housing temperature does not exceed 90°C. This value is measured at environment temperature 25°C. The Max. Input Speed is the max. permitted input speed of gearbox by the Cyclic operation (S5). This value is measured at environment temperature 25°C and serves as the absolute limit of the gearbox. Backlash arcmin The Backlash is the maximum angular measurement between two teeth of gears when the transverse operation occurs (refer to Diagram 1). The arcmin is the measurement unit for the backlash. One arcmin equals 1/ 60 degree, symbolized as 1'. Nm/arcmin Torsional Rigidity Moment of Inertia J1 2 kg.cm The transmission efficiency of the gears inside a gearbox (without friction). The Operating Temperature indicates the temperature of gearbox housing. APEX uses synthetic lubrication grease. Alternate greases are available, please contact APEX. The Running Noise is measured depends on gearbox size, the ratio and the speed*. Higher speed usually induces higher noise level, while higher ratio induces lower noise level. The Moment of Inertia J1 is a measurement of the effort applied to an object to maintain its momentary condition at rest or rotating. Breakaway Torque The Breakaway Torque is the minimum torque to start the rotation from the input side of gearbox. A smaller size or a higher ratio gearbox requests less Breakaway Torque. Nm Back Driving Torque The Back Driving Torque is the minimum torque to start the rotation from the output side of gearbox. A larger size or a higher ratio gearbox requires greater Back Driving Torque. Nm Operating pitch circles (transverse operation) Backlash Ø(arcmin) Ø(arcmin) Test torque -T(Nm) T(Nm) 50% 100% T Ø * This value is measured at environment temperature 25°C and the input speed 3,000 rpm. If the Nominal Input Speed n of gearbox is 1N over 3,000 rpm, this value is measured by that specific Nominal Input Speed. F2 r F2a F2 r F2a Radial Load Axial Load L X Radial Load And Axial Load The permitted radial and axial loads on output shaft of the gearbox depend on the design of the gearbox supporting bearings. For more information, please refer to APEX website. N Degree of Protection IP code stands for International Protection standard. The IP65 as example: the first IP number stands for protection degree against dust; the second IP number stands for protection against liquid. Nm Nm Nm Diagram 1 Diagram 2 Backlash(defined) Torsional Rigidity is the quotient (△T / △Ø) between the applied torque and resulting torsion angle. This value indicates how much torque is needed on the gearbox to rotate the output shaft for 1 arcmin. The Torsional Rigidity can be determined by Hysteresis Curve. Hysteresis Curve When the input shaft is locked, increase torque at the output slowly up to T in both directions and 2B then release the torque gradually. According to the measured torque and torsion angle, a closed curve will be acquired as in the Diagram 2. 10 APEX DYNAMICS, INC. Glossary rpm rpm Max. Input Speed n1B Efficiency % Operating Temperature º C Lubrication dB(A) Nominal Input Speed n1N Running Noise Emergency Stop Torque T2NOT Max. Acceleration Torque T2B The Emergency Stop Torque is the maximum permitted torque at the output of gearbox. This may happen only occasionally and may not exceed 1,000 times during the whole service life. Under the Cyclic Operation (S5), the Max. Acceleration Torque is the maximum torque which can be transmitted only briefly to the output of gearbox up to 1,000 cycles/hr. No Load Running Torque The No Load Running Torque is the min. torque to overcome the internal friction of a gearbox without loading*. The Nominal Input Speed is the permitted input speed of gearbox by the Continuous Operation (S1) while the housing temperature does not exceed 90°C. This value is measured at environment temperature 25°C. The Max. Input Speed is the max. permitted input speed of gearbox by the Cyclic operation (S5). This value is measured at environment temperature 25°C and serves as the absolute limit of the gearbox. Backlash arcmin The Backlash is the maximum angular measurement between two teeth of gears when the transverse operation occurs (refer to Diagram 1). The arcmin is the measurement unit for the backlash. One arcmin equals 1/ 60 degree, symbolized as 1'. Nm/arcmin Torsional Rigidity Moment of Inertia J1 2 kg.cm The transmission efficiency of the gears inside a gearbox (without friction). The Operating Temperature indicates the temperature of gearbox housing. APEX uses synthetic lubrication grease. Alternate greases are available, please contact APEX. The Running Noise is measured depends on gearbox size, the ratio and the speed*. Higher speed usually induces higher noise level, while higher ratio induces lower noise level. The Moment of Inertia J1 is a measurement of the effort applied to an object to maintain its momentary condition at rest or rotating. Breakaway Torque The Breakaway Torque is the minimum torque to start the rotation from the input side of gearbox. A smaller size or a higher ratio gearbox requests less Breakaway Torque. Nm Back Driving Torque The Back Driving Torque is the minimum torque to start the rotation from the output side of gearbox. A larger size or a higher ratio gearbox requires greater Back Driving Torque. Nm Operating pitch circles (transverse operation) Backlash Ø(arcmin) Ø(arcmin) Test torque -T(Nm) T(Nm) 50% 100% T Ø * This value is measured at environment temperature 25°C and the input speed 3,000 rpm. If the Nominal Input Speed n of gearbox is 1N over 3,000 rpm, this value is measured by that specific Nominal Input Speed. F2 r F2a F2 r F2a Radial Load Axial Load L X Radial Load And Axial Load The permitted radial and axial loads on output shaft of the gearbox depend on the design of the gearbox supporting bearings. For more information, please refer to APEX website. N Degree of Protection IP code stands for International Protection standard. The IP65 as example: the first IP number stands for protection degree against dust; the second IP number stands for protection against liquid. Nm Nm Nm Diagram 1 Diagram 2 Backlash(defined) Torsional Rigidity is the quotient (△T / △Ø) between the applied torque and resulting torsion angle. This value indicates how much torque is needed on the gearbox to rotate the output shaft for 1 arcmin. The Torsional Rigidity can be determined by Hysteresis Curve. Hysteresis Curve When the input shaft is locked, increase torque at the output slowly up to T in both directions and 2B then release the torque gradually. According to the measured torque and torsion angle, a closed curve will be acquired as in the Diagram 2.