DSK DR-Series Helical Geared Motors from South Korea
Discover the DSK DR-Series Helical Geared Motors, a premium line from South Korea featuring power ratings from 0.4kW to 160kW, torque up to 18,000Nm, and ratios from 3.37 to 7,307. Learn about available types, options, and how to select the right model using the catalog.
Introduction to DSK Korean DR-Series Helical Geared Motors
What is the DSK DR-Series?
DR-Series DSK – Helical Geared Motors is a line of helical geared motors from DSK, belonging to the industrial drive product group developed by Daesung Industrial Co., Ltd.
The DR-Series is designed for systems requiring stable transmission, a wide range of gear ratios, and various mounting configurations. With a helical gear structure, the product focuses on smooth operation, reduced vibration, and effectively meeting the requirements for selecting geared motors in factories.
The DR-Series features a power range from 0.4kW to 160kW, a maximum gearbox torque of 18,000Nm, and a gear ratio range from 3.37 to 7,307. This product line is suitable when businesses need to select a geared motor based on output speed, torque, mounting style, radial load, axial load, and actual operating conditions.
DR-Series DSK – DSK Korean helical geared motor line.
General Specifications of DSK DR-Series
Category | Details |
|---|---|
Series | DR-Series |
Product Name | Helical Geared Motors |
Drive Type | Helical geared motor |
Motor Power | 0.4 – 160kW |
Gearbox Max Torque | 18,000Nm |
Ratio | 3.37 – 7,307 |
Main Mounting Style | Foot mounted, B5 flange mounted, input-shaft style |
Compatible Motor | IEC-Flange Motor |
Ambient Temperature | -10°C to 40°C |
Ambient Humidity | Below 80% |
Input Speed Note | If exceeding 1,800rpm, please contact the Mdrivetech team for consultation |
Highlights of DR-Series DSK
Wide power range and gear ratios
The DR-Series DSK features various power ratings and gear ratios, allowing users to easily select the model that matches the required output speed and load. The ratio range of 3.37 – 7,307 enables flexible application in various drive configurations.
Helical gear design
The helical gear mechanism ensures smoother gear meshing, helping to reduce noise and vibration during operation. This is one of the reasons why helical gear series are often chosen for drive systems requiring high stability.
IEC-Flange Motor compatibility
The DR-Series can be coupled with IEC-Flange Motors, providing convenience in motor selection, replacement, or configuring drive systems according to actual requirements.
Multiple operational options
The product series supports options such as INV, HL, AF, EN and brake options like AC-B, DC-B. Consequently, users can select configurations suitable for control needs, load stopping, VFD operation, or speed monitoring.
Main types of DR-Series DSK
The DR-Series consists of 3 main types: DR..7 Type, DRF..7 Type, and DRS..7 Type.
The three main types of DR-Series DSK include DR..7, DRF..7, and DRS..7.
DR..7 Type – Foot Mounted Helical Gear Reducer
DR..7 Type is a foot-mounted helical gear reducer series with a two-stage or three-stage structure.
Key features:
Type: DR..7
Structure: Two-stage or three-stage
Reducer type: Helical gear reducer
Mounting type: Foot mounted
The foot-mounted style is suitable for designs requiring the gearbox to be fixed onto a machine base or frame.
DRF..7 Type – B5 Flange Mounted Helical Gear Reducer
DRF..7 Type is a B5 flange-mounted helical gear reducer series with a two-stage or three-stage structure.
Key features:
Type: DRF..7
Structure: Two-stage or three-stage
Reducer type: Helical gear reducer
Mounting type: B5 flange mounted
The B5 flange-mounted style is suitable for machine assemblies requiring the gearbox to be connected directly via a flange.
DRS..7 Type – Input-Shaft Style
DRS..7 Type is an input-shaft style helical gear reducer series with a two-stage or three-stage structure, foot mounted, and noted as Line Power Type.
Key features:
Type: DRS..7
Structure: Two-stage or three-stage
Reducer type: Helical gear reducer
Mounting type: Foot mounted
Input type: Input-shaft style
Note: Line Power Type
How to read DSK DR-Series model codes
DR-Series model codes typically indicate key information such as type, frame, ratio, motor capacity, voltage, frequency, motor option, and brake option.
Example code structure:
DR 87 - 41.74 / 2.2kW - 380V - 60Hz - (-) / AC-B
Component | Description |
|---|---|
DR | Type |
87 | Frame No |
41.74 | Ratio |
2.2kW | Motor Capacity |
380V | Voltage |
60Hz | Frequency |
(-) | Motor Option |
AC-B | Brake Option |
Example 1: DRF57-43.3/1.5kW-2/3V-60Hz(INV)/DC-B
This model indicates a DRF-Series frame 57 configuration, ratio 43.3, 1.5kW motor, 60Hz frequency, with INV – Use for Inverter and DC Brake options.
Example 2: DR77-113.56/2.2kW-2/3V-50Hz/AC-B(HL)
This model indicates a DR-Series frame 77 configuration, ratio 113.56, 2.2kW motor, 50Hz frequency, with AC Brake and Hand Lever Brake options.
DSK Geared Motor options
Symbol | Option Name |
|---|---|
T | Torque Arm |
INV | Use for Inverter |
HL | Hand Lever Brake |
AF | Axial Fan |
EN | Encoder |
AC-B | AC Brake |
DC-B | DC Brake |
DSK Geared Motor options include Torque Arm, Use for Inverter, Hand Lever Brake, Axial Fan, and Encoder.
Among these, INV – Use for Inverter is an option for motors used with variable frequency drives. If the system requires speed adjustment via an inverter, it is recommended to select the correct motor option and verify operating conditions before confirming the model.
DR-Series DSK Power Range
The DR-Series DSK features various motor power ratings, including:
0.4kW, 0.75kW, 1.5kW, 2.2kW, 3.7kW, 5.5kW, 7.5kW, 11kW, 15kW, 18.5kW, 22kW, 30kW, 37kW, 45kW, 55kW, 75kW, 90kW, 110kW, 132kW, 160kW.
The DR-Series specification table provides data such as motor capacity, type, ratio, output speed, output torque, service factor, and overhung load for both 60Hz and 50Hz. When selecting a model, it is necessary to specify the operating frequency to ensure the correct parameters are referenced.
How to Select the Appropriate DR-Series DSK
To select the correct DR-Series model, it is necessary to determine the complete operating data of the system. One should not select based solely on motor power, as each application also depends on speed, load, torque, and the drive method.
Required information includes:
Usage: purpose of use
Required Speed: required speed
Required Power: required power
Frequency of Starting and Stopping: frequency of starting and stopping
Daily Usage Time: daily operating time
Radial Load and Axial Load: radial load and axial load
Drive Method: drive method such as sprocket, chain, or belt
Once the data is obtained, it is necessary to calculate the gear ratio, select the motor power, check the moment of inertia, determine the service factor, and check the overhung load if the output shaft is connected to gears, sprockets, pulleys, or belts.
Service Factor and Overhung Load
Service factor is determined based on the load type, frequency of starting/stopping, and daily operating time.
Load type | Condition |
|---|---|
Uniform load | Mass acceleration factor M ≤ 0.2 |
Medium impact load | Mass acceleration factor M ≤ 3 |
Heavy shock load | Mass acceleration factor M ≤ 10 |
If the mass acceleration factor M > 10, technical verification is required before selecting a model.
Overhung load refers to the radial load acting on the output shaft. This parameter must be checked when the output shaft is connected to gears, sprockets, pulleys, or belts. Ignoring the overhung load may result in a selected model that is unsuitable for actual operating conditions.
Mounting Position and Lubrication Check
The DR-Series offers various mounting positions such as M1, M2, M3, M4, M5, M6. The mounting position affects the location of the breather valve, oil level plug, oil drain plug, and the required amount of lubricant.
The DR-Series DSK mounting position must be determined before checking the lubricant and selecting the mounting configuration.
Before operation, it is necessary to check the position of the breather valve and the lubricant level via the oil level plug. The oil quantity depends on the gearbox size, mounting type, and actual mounting position.
Output shaft tolerances:
Shaft type | Tolerance |
|---|---|
Solid shaft ≤ 50mm | ISO k6 |
Solid shaft > 50mm | ISO m6 |
Hollow shaft | ISO H7 |
When is technical verification required before model selection?
Technical verification is recommended before selecting a model in the following cases:
Input shaft speed exceeds 1,800 rpm
Mass acceleration factor is greater than 10
High impact loads or high inertia
High start-stop frequency
Significant radial load on the output shaft
Significant axial load
Use of pulleys, sprockets, chains, or belts with high tension
Mounting position not clearly defined
Selection of options such as INV, HL, AF, EN, AC-B, or DC-B is required
MDriveTech consultation for DR-Series DSK selection
When selecting a model, customers should provide information such as: application purpose, required speed, required power, gear ratio, start/stop frequency, daily operating hours, radial load, axial load, transmission method, mounting position, voltage, frequency, brake options, and motor options. Selecting the correct model ensures the drive system is better suited to actual requirements, especially in cases where sprockets, chains, belts, or pulleys are attached to the output shaft.
MDriveTech assists customers in selecting DR-Series DSK Helical Geared Motors based on technical specifications and actual operating conditions.
📞 Hotline: 0868 789 647
📧 Email: [email protected]
Frequently Asked Questions about DR-Series DSK
What is the DR-Series DSK?
The DR-Series DSK is a line of Helical Geared Motors from DSK.
What is the power range of the DR-Series?
The DR-Series has a power range from 0.4kW to 160kW.
What is the gear ratio of the DR-Series?
The gear ratio range of the DR-Series is 3.37 – 7,307.
What is the maximum gearbox torque of the DR-Series?
The Gearbox Max Torque of the DR-Series is 18,000Nm.
What is the difference between DR..7, DRF..7, and DRS..7?
DR..7 is a foot mounted helical gear reducer.
DRF..7 is a B5 flange mounted helical gear reducer.
DRS..7 is an input-shaft style foot mounted helical gear reducer, also noted as Line Power Type.
Can the DR-Series be used with a VFD?
Yes. The DR-Series has an INV – Use for Inverter option. When used with a VFD, it is necessary to select the correct motor option and verify the actual operating conditions.
Conclusion
DR-Series DSK – Helical Geared Motors is a line of helical geared motors from DSK Korea, featuring a power range of 0.4 – 160kW, a maximum gearbox torque of 18,000Nm, and a ratio of 3.37 – 7,307.
The DR-Series includes 3 main types: DR..7, DRF..7, and DRS..7, corresponding to foot mounted, B5 flange mounted, and input-shaft style mounting configurations. When selecting a model, it is essential to fully verify the power, speed, ratio, output torque, service factor, overhung load, and mounting position to ensure suitability for actual operating conditions.
