Grove Gear 8050 Catalog

Technical Information

High Efficiency Helical - Bevel

Gear Reducers

TQ (In-Ib) = (HP x 63025)

HP (Rotational) = TQ (In-Lb) x RPM

RPM

63025

TQ( ft-Ib) = (HP x 5252)

HP (Rotational) = TQ (ft-Ib) x RPM

RPM

5252

TQ (In-Ib) = W x R

HP (Linear) = W x V 33000

High Efficiency Parallel Shaft

Torque and Horsepower Torque as it is related to gear reducers is defined as a twisting motion resulting in rotational movement. Horsepower is a measure of the rate of doing work, and depends on speed of rotation and the radius of rotation. HP = TQ x Speed (RPM) TQ = HP x 63025 63025 RPM Efficiency The efficiency of a Worm Gear Speed Reducer is dependent on input speed, lead angle of the worm, type of lubricant, ambient temperature and many other variables. The efficiency for speed reducer can be easily calculated as follows. Efficiency = Output HP Input HP Overhung Load & Thrust Loads $Q RYHUKXQJ ORDG H[LVWV ZKHQ D IRUFH LV DSSOLHG DW ULJKW DQJOHV WR D VKDIW EH\RQG WKH VKDIW·V RXWHUPRVW EHDULQJ 3XOOH\V VKHDYHV DQG VSURFNHWV ZLOO cause an overhung load when used as a power take-off. The amount of overhung load will vary, depending on the type of power take-off used and its mounting location on the shaft. The catalog Overhung Load ratings listed below are calculated at the centerline of the shaft. Overhung load ratings are listed for each reducer size and should not be exceeded. If the basic reducer is selected using a service factor, that factor must also be used in the equations below. Output Shaft OHL = Input Shaft OHL = 126000 x Motor HP x Output HP Rating x O L X L F 126000 x Motor HP x O L X L F Pitch Diameter (of sprocket, pulley or sheave) x Input HP Rating x Output RPM Pitch Diameter (of sprocket, pulley or sheave) x Input RPM Efficiency (Total) = Eff 1 + Eff 2 + Eff 3

Gear Reducers

Stainless Steel & WASHGUARD ® High Efficiency Gear Reducers Technical Information Warnings and Cautions Terms and Conditions

Overhung Load Factors (O L ) Sprocket 1.00 Gear Pinion 1.25 V-Belt Sheave or Pulley 1.50 Flat Belt 2.50

F R

OVERHUNG LOAD LOCATED ONE SHAFT DIAMETER FROM HOUSING

F A

LOAD LOCATION FACTORS - LF:

Distance 813 815 818 820 824 826 830 832 842 852

860-8100

1 x T 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 2 x T 0.46 0.61 0.49 0.58 0.58 0.57 0.48 0.57 0.56 0.56 3 x T 0.30 0.44 0.32 0.41 0.41 0.40 0.32 0.40 0.39 0.39 Contact Factory

4 x T 0.22 0.34 0.24 0.31 0.31 0.31 0.24 0.31 0.30 0.30 5 x T 0.18 0.28 0.19 0.26 0.26 0.25 0.19 0.25 0.24 0.24 'LVWDQFH GLVWDQFH RI ORDG IURP VLGH RI KRXVLQJ LQ WHUPV RI VKDIW GLDPHWHU ¶7· T = Shaft diameter

Overhung Load – Overhung load is imposed upon a shaft when a pinion or sprocket is used as a power take-off. The magnitude of the load varies with the type of PTO and its location to the shaft bearing. Calculate the load (including minimum required service factor) and check the result against the tabulated overhung load rating. The overhung load formula below considers the transmitted horsepower with service factor. This is appropriate for applications where starting loads, momentary overloads and brake capacities do not exceed 200% of gear reducer rating (100% overload). For other conditions, calculate the actual application load by multiplying the transmitted power by the appropriate service factor.

Lf = load location factor (the input shaft OHL is assumed to be applied at one shaft diameter from the seal cage, (Lf = 1.0) if the load is applied at a distance greater than one shaft diameter from the seal cage, refer the application to the Factory). The calculated overhung load must be less than or equal to the capacity shown on pages 645-648.

Load Location Factor (Lf) – the output shaft load location factors are shown below.

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