Grove Gear 8050 Catalog

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High Efficiency Helical - Bevel
Gear Reducers
High Efficiency Parallel Shaft
Gear Reducers
Stainless Steel
&
WASHGUARD
®
High Efficiency Gear Reducers
Technical Information
Warnings and Cautions
Terms and Conditions
Technical Information
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
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
Efficiency(Total) = Eff 1 + Eff2 + Eff3
Overhung Load & Thrust Loads
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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
Overhung Load Factors (OL)
Sprocket 1.00
Gear Pinion 1.25
V-Belt Sheave or Pulley 1.50
Flat Belt 2.50
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
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T = Shaft diameter
OVERHUNG LOAD
LOCATED ONE
SHAFT DIAMETER
FROM HOUSING
F R
F A
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.