High-Precision Reducer for Servo Motors AF3 Type

Specifications

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Compare 5 models in the same series by specification.

How to choose Speed reducers

Points to check when selecting, with the values for this product (High-Precision Reducer for Servo Motors AF3 Type).

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

   This product: Reduction Ratio 1/10 to 1/180 (up to 1/120 for 100W only), 1/5 to 1/240

   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

   This product: Applicable motor capacity 100W～2000W

   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

   This product: Backlash 1 min / 3 min / 30 min (excluding some models)

   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

Available in concentric hollow shaft (AF3S) and concentric solid shaft (AF3F) configurations. Specifications with backlash accuracy of 1 arcmin or 3 arcmin are available, supporting high-precision positioning control.

FAQ

Q. Which types and backlash accuracies can be selected for the AF3 type (AF3S and AF3F) of the GTR series?

A. There are two types: concentric hollow shaft (AF3S) and concentric solid shaft (AF3F). Backlash accuracy is available in 1 arcmin and 3 arcmin specifications.

Q. What are the applicable motor capacity and reduction ratio ranges for the AF3 type?

A. Applicable motor capacities range from 100 W to 2000 W. Reduction ratios are 1/10 to 1/180 (up to 1/120 for 100 W only) and 1/5 to 1/240.

Q. Is there an AF3 type model with 30 arcmin backlash?

A. Backlash is available in 1, 3, and 30 arcmin. However, some models are excluded.

Q. For which applications is the AF3 type suitable, such as machine tools and industrial robots?

A. It is used in machine tools, industrial robots, and positioning devices. Backlash accuracy is available in 1 arcmin and 3 arcmin specifications, supporting high-precision positioning control.

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

Source documents

• Catalog SERVO GEARBOXES GUIDE サーボモータ用減速機ガイド Open page 5
  Found on: https://www.nissei-gtr.co.jp/download/catalog/gtr/