DGF / DGH / DGS Gear Head

Specifications

How to choose Speed reducers

Points to check when selecting, with the values for this product (DGF / DGH / DGS Gear Head).

1. 1. Determine the reduction ratio from the required speed and torque

   The output rotational speed equals the motor rotational speed divided by the reduction ratio, and the output torque is approximately the reduction ratio times the input torque (minus transmission efficiency losses). Determine the rotational speed and torque required on the load side first, then select a reduction ratio that satisfies both.

2. 2. Provide margin in the permissible output torque

   Confirm that the rated output torque of the output shaft exceeds the load torque. Because torque beyond the rating is applied during startup and stopping, also check the permissible peak torque at startup and stop (as a percentage of rated torque; for example, some products are rated at 350%).

3. 3. Check the motor capacity to be combined

   Each reducer has a specified motor output that can be mounted. If the motor capacity is too large, the torque after reduction may exceed the permissible value, so select within the applicable motor capacity range and also confirm compatibility of the mounting flange.

4. 4. Backlash according to positioning accuracy

   Backlash is the play in the rotational direction of the output shaft, measured in arcminutes (1/60 degree). For positioning and reciprocating motion, smaller is better; some products are available in 1 arcminute or 3 arcminutes, and some traction drive products offer no-backlash operation.

5. 5. Select the shaft category that suits the equipment layout

   The choice of coaxial, parallel or right-angle shaft changes the arrangement inside the equipment. Right-angle shafts allow a reduced depth through right-angle mounting, and hollow shafts allow a mating shaft to be inserted directly. Also check whether leg mounting or flange mounting is required.

6. 6. Check input speed and external dimension constraints

   For high-speed operation, confirm that the instantaneous maximum input rotational speed (for example, 7000 r/min) is not exceeded. Also verify at the design stage that the outer diameter fits the installation space and whether the unit can replace an existing product with identical dimensions.

This guide was written by AI based on the listed products' documents and specification items.

About Speed reducers and all products

Description

Table showing the type of compatible gear head for each servo motor capacity across various manufacturers. Because the motor mounting flange angle dimensions of the gear head may differ from the motor flange dimensions, confirmation is required when ordering. Details of the input shaft and flange are to be confirmed separately according to specifications such as those with oil seal.

FAQ

Q. Which servo motors can the DGF / DGH / DGS Gear Head be mounted on?

A. The list shows the gear head type compatible with each servo motor capacity across various manufacturers. Applicable motor capacities range from 100 to 1290 W, and rated rotational speeds range from 1500 to 8000 r/min.

Q. What should be checked before mounting the DGF / DGH / DGS Gear Head on a motor?

A. The motor mounting flange angle dimensions of the gear head may differ from the motor flange dimensions, so confirmation is required when ordering. Details of the input shaft and flange should be confirmed separately according to specifications such as those with oil seal.

Written by AI based on the content of the source documents.

Source documents

• Catalog モータマッチング・容量形状種別一覧表 Open page 1
  Found on: https://www.nissei-gtr.co.jp/product/rc/gearhead/