Technical Data  Reducers  DCBL Hypoid Motor  Selection

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Selection

Motor capacity can be selected by us according to operating cycle, load torque, etc.

Please use the selection request sheet for inquiries.

1. Conditions

(1) Operation cycle

Output shaft speed
Output shaft speed
  • nT：Maximum output shaft speed (r/min)
  • t1：Acceleration time (sec)
  • t2：Constant speed time (sec)
  • t3：Deceleration time (sec)
  • t4：Stopped time (sec)
  • tt：Time for 1 cycle (sec.)
Output torque
Output torque
  • Ta：Acceleration torque (N・m)
  • Tc：Constant speed torque (N・m)
  • Tb：Deceleration torque (N・m)

(2) Load moment of inertia 　Ir

Calculate the load moment of inertia Ir on the output shaft of the reducer from the table for "Determining the moment of inertia".

Ir：Load moment of inertia on the output shaft of the reducer (kg・m2)

Load moment of inertia

(3) Acceleration torque and deceleration torque 　Ta, Tb

Acceleration torque 　Ta = △Ta + Tc

Deceleration torque

△Ta = 2πIr × △na 60 × t1

Tb = △Tb - Tc

△Tb = 2πIr × △nb 60 × t3

  • Ir：Load moment of inertia on the output shaft of the reducer (kg・m2)
    {Ir + (Ig + Im) × i2}
    (Inertia for the motor shaft converted load at reducer + Motor inertia ) × Reduction Ratio ^2 (Moment of Inertia Data )
  • △Ta：Inertia acceleration torque (N・m)
  • △na：Speed difference (r/min) △na = nT - no
  • △Tb：Inertia deceleration torque (N・m)
  • △nb：Speed difference (r/min) △nb = nT - no

(4) Constant speed torque 　Tc

Constant speed torque

Tc = G(M1 + 2.1 × M2 × L) × μ × r

G = Gravitational acceleration ：9.80665m/s2
Constant speed torque

Tc = G(M1 + M2) × μ × ℓ 2 × π × η

Constant speed torque

Tc = GM × r

2. Selection procedure

(1) Calculate the reduction ratio i i ≒ Nm nT

Nm：Motor speed

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(2) Calculate the average output torque Calculate the average output torque
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(3) Determine a size

Average torque
Tave. < rated torque of the output shaft of the reducer

Maximum torque
Ta < rated torque of the output shaft of the reducer × Series-based factor fs
Tb < rated torque of the output shaft of the reducer × Series-based factor fs

 fs：Series-based factor

Maximum torque < maximum torque of the output shaft of the reducer

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(4) Calculate nave., the average output shaft speed Average output shaft speed
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(5) Confirming the rpm

nave. × i < rated input speed of the reducer

nT × i < maximum input speed of the reducer

Series Input speed (r/min)
Rating Maximum
DCHM 2500 3000
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(6) Check the output shaft radial load O.H.L < N：Allowable radial load of the reducer ※

O.H.L = 2000 × Ta × f × Lf D

D：Pitch diameter (mm) of sprockets and similar objects (mm)

※See the allowable radial loads in the capacity tables.

f：O.H.L. factors

Chain Gear, toothed belt V-Belt
1.0 1.25 1.5

Lf：Point of action factor

ℓ/Q 0.25 0.38 0.5 0.75 1
Lf 0.8 0.9 1 1.5 2

Standard length ：Q

Model No. Reduction Ratio Q
DCHM020 10 ～ 60 36
DCHM040 10 ～ 50 42
DCHM075 10 ～ 50 58

Series-based factor ：fs

Model No. Series-based factor
DCHM 1.7

Hollow output shaft

Hollow output shaft

Q：See the tables to the left for the standard length.

Solid output shaft

Solid output shaft

Q：See each type's dimensions for the standard length.

3. Overhang load of the output shaft

When attaching the sprocket, gear, or belt to the output center shaft, or to the hollow shaft using a case tap, confirm that the overhang load acting on the output shaft is equal to or lower than the allowable O.H.L. of the gear motor.

※When using a high-strength toothed belt, do not use the O.H.L. factor shown in Table 1, but take into account the mounting tension in calculating the O.H.L.

[Overhang load calculation ]

Allowable O. H. L. ≧ 2000 × TF × f × Lf Dp

  • TF：Correction torque
  • f：O.H.L. factor (Table 1)
  • Lf：Point of action factor (Formula 1 )
  • Dp：Pitch diameter (mm) of sprockets and similar objects (mm)

Standard length ：Q

Model No. Reduction Ratio Q
DCHM020 10 ～ 60 36
DCHM040 10 ～ 50 42
DCHM075 10 ～ 50 58

Table 1 .O.H.L. factors ：f

Chain Gear, toothed belt V-Belt
1.0 1.25 1.5

Formula 1 .Point of action factor ：Lf

ℓ/Q 0.25 0.38 0.5 0.75 1
Lf 0.8 0.9 1 1.5 2
Solid shaft Hollow shaft
Solid output shaft

Q：See each type's dimensions for the standard length.

Hollow output shaft

Q：See the tables to the left for the standard length.

4. Moment of inertia for the motor shaft converted load

Model No. Reduction ratio Moment of Inertia
×10-4kg・m2
DCHM020-20H 10 0.065
15 0.050
20 0.045
25 0.041
30 0.040
40 0.039
50 0.038
60 0.037
DCHM040-30H 10 0.117
15 0.076
20 0.060
25 0.051
30 0.047
40 0.056
50 0.052
DCHM075-35H 10 0.306
15 0.209
20 0.170
25 0.146
30 0.140
40 0.158
50 0.145
Model No. Reduction ratio Moment of Inertia
×10-4kg・m2
DCHM020-22U 10 0.068
15 0.051
20 0.046
25 0.041
30 0.040
40 0.039
50 0.038
60 0.037
DCHM040-28U 10 0.133
15 0.083
20 0.065
25 0.054
30 0.049
40 0.059
50 0.054
DCHM075-38U 10 0.347
15 0.227
20 0.180
25 0.152
30 0.145
40 0.165
50 0.149

DCBL Hypoid Motor

Motor Capacity Brake Moment of Inertia
×10-4kg・m2
0.2kW No brake 1.154
With brake 1.159
0.4kW No brake 1.753
With brake 1.780
0.75kW No brake 12.761
With brake 12.918