Products Power Transmission Products

  • Mechanical Infinitely Variable Speed Drive

DISCO Variable Speed Drive

Mechanical infinitely variable speed drives with planetary gear traction drive

  • High performance and quiet operation with less rotational fluctuations.
  • Wide variation with 3 series: constant torque type (DK), constant power type (DB), and ultra-wide gear ratio range type (DZ).
  • Extensive control devices.
  • Durable, long life even under shock load and frequent start/stop operations.
DISCO variable speed drive
Product information
We are discontinuing sales of the DISCO Variable Speed Drive on March 31, 2018.


Low Backlash & Good Shock Resistance
The construction allowing for constant pressure, where spring pressure transmits torque, eliminates backlash and provides excellent shock resistance. Safe for use in applications requiring frequent start/stop and reversible operations.
Speed Stability
With precisely machined parts, there are much fewer rotational fluctuations in all variable speed ranges over long periods of operation and under changing loads. It also runs quietly with very little vibration.
High Efficiency & Long Life
Employs a mechanism with several planetary gears sharing power and a synthetic lubricant to achieve high torque with low surface pressure, and wide speed variation range and long service life at the same time.
Smallest in its Class
The unique construction minimizes the number of parts, delivering the most compact and lightweight design in its class

2.Use of Each Series (K, Z, B)

Use of Each Series (K, Z, B)
Series Characteristics Applications Capacity (kW) Variable Speed Range
K Constant torque type Conveyor
Pump drive
0.1 to 0.75 1:6
Z Wide variable speed range 0 revolution 0.2 to 3.7 0 to ∞
B Constant horsepower type Machine tool
Constant power load
0.4 to 5.5 1:4



4.Reference Number System

Reference Number System
(1) Series
K: K Series (constant torque type)
B: B Series (constant power type)
Z: Z Series (ultra wide gear ratio range)
(2) Capacity Code
007: 0.75kW, 037: 3.7kW
(3) DISCO Mounting Type
A: foot mount
F: flange mount (including reducers with foot)
(4) Drive Unit Type
M: Direct connected 4-pole standard motor (IE1)
ME: Direct connected 4-pole top runner motor (IE3)
No code: double shaft type
(5) Speed Reducer Code
R: with R type reducer (1 stage reduction)
T: with T type reducer (2 to 3 stages reduction)
(6) Speed Reduction Ratio
30: 1/30, 100: 1/100
(7) Speed Reducer Mounting Type
A: foot mount
F: flange mount
VD: vertical flange mount
VDCFI: vertical flange mount with cooling fan
No code: mounted with foot of variable speed unit

5.Standard Model (K Series)

Motor Capacity
Three Phase (kW)
Basic Type With Reducer
0.1 Without Reducer 1/2.5 to 1/50
0.2 1/2.5 to 1/3600
0.4 1/2.5 to 1/3600
0.75 1/2.5 to 1/3600
1.5 1/2.5 to 1/1500
2.2 1/2.5 to 1/470
3.7 1/2.5 to 1/270
5.5 1/2.5 to 1/270
7.5 1/2.5 to 1/180