Open Loop Hollow Rotary Actuator

The OS type of GIGAGER Hollow Rotary Actuator is a line of products that combine a high rigidity hollow rotary table with a dedicated open loop stepper motor and driver package. It retains the ease of use of a stepper motor, while also allowing for highly accurate positioning of large inertia loads.
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Product Details

OS Type Open Loop Stepper Motor Hollow Rotary Actuators

The OS type of GIGAGER Hollow Rotary Actuator is a line of products that combine a high rigidity hollow rotary table with a dedicated open loop stepper motor and driver package. It retains the ease of use of a stepper motor, while also allowing for highly accurate positioning of large inertia loads.

• Integrated actuator and stepper motor makes design easier

• Large-diameter hollow output table

• Economic choice for automation device

1. What is the Hollow Rotary Actuator?

The Hollow Rotary Actuator is a brand-new kind of rotating load device. Incorporating high transmission efficiency, high precision, high rigidity, and high cost performance, it combines the advantages of the servo motor, cam indexer and DD motor, obtaining a balance between these three products.

Gears are made of high strength carburizing alloy steel and the hardness of the tooth surface after carburizing can reach HRC60±2°.

With the help of packaged precise open loop stepper motor, the Hollow Rotary Actuator can make segments at any angle, which can meet the digit control that the cam indexer cannot achieve. The positioning accuracy is comparable with the direct drive motor which can realize the positioning of the inertia load in a short time.


2. What is the product features of OS type Hollow Rotary Actuator?

• Improve Reliability and Reduce Cost Through Direct Connections

The equipment table and robot arm can be directly mounted on the output table of Hollow Rotary Actuator. It can save the time and cost for mechanical design, parts allocation, belt debugging, etc., which compared with the use of mechanical parts such as pulleys and belt.

• Ideal Alternative to DD Motor and Cam Indexer

GIGAGER Hollow Rotary Actuator takes the advantages of servo motor, cam indexer and DD motor, making the indexing at any angle and high performance.


• High Precision Positioning without Backlash

Non-backlash, repetitive positioning accuracy up to ±5 arc seconds, positioning accuracy ≦ 2 arc min.

Note: The repetitive positioning accuracy is measured at a constant temperature (normal temperature) under a constant load.

• Large Diameter Hollow Structure Makes Wiring and Piping Possible

Wiring and piping are more convenient and simple, and the advantages of this feature are particularly prominent in complicated wiring and piping environments.


3. System Configuration of OS type Hollow Rotary Actuator


Configuration of OS type Hollow Rotary Actuator

Standard Configuration

Optional Accessories


Hollow Rotary Table × 1 set


Sensor Plate × 1 set


Open Loop Stepper Motor × 1 set


Photoelectric Home Sensor × 1 set


Driver for OS Stepping Motor × 1   set


Sensor Bracket × 1 set

4. How Many Model Are Available?


Bearing Type

Frame Size

Gear Ratio

Permissible Torque

Permissible Speed

Permissible Moment of Inertia Load


Cross Roller Bearing

60 mm (2.36 in.)


1.2 N.m

40 rpm (table)

5 N.m


Cross Roller Bearing

85 mm (3.35 in.)


3.2 N.m

60 rpm (table)

10 N.m


Cross Roller Bearing

130 mm (5.12 in.)


20 N.m

40 rpm (table)

50 N.m


Cross Roller Bearing

200 mm (7.87 in.)


50 N.m

40 rpm (table)

100 N.m


Tapered Roller Bearing

60 mm (2.36 in.)


4.9 N.m

200 rpm (table)

5 N.m

For more details, please refer to attached Catalogue. (download the PDF in this page)


5. What Type of Device Could Use the Hollow Rotary Actuator?

The Hollow Rotary Table could be applied for many application like CNC Indexing Device, Rotating Stage, Military Radar, Laser Marking Machine, Gyro Test, Gravity Sensor Test, Electronic Compass Test of mobile phone and other precise electronic product. It also can used for robot arm joints, automation production line, testing device, laser cutting, etc.


Demo Video Link:

a. Demo for Gyro Test

b. Demo for the 4th Axis or 5th Axis

For more video, please click GIGAGER Youtube Channel:

6. How to Select the Right Model for My Device?

Basically, we need the following information, please submit to our technical sales.

a, What’s the weight of loading? Dimension? Irregular object or regular object?

b, Stage material: Steel or Aluminum, or_________, Outer Diameter=______mm, Thickness=_______mm

c, How many Segmentation? Or how is the motion?

d, Each tour duration=Rotating time + Positioning time, _________Second =  ________+_________Seconds

e, Fixture weight: ____________kg/pcs

f, Photo, drawing or more info about your device

Our engineer shall advice the suitable model as per your requirement.

For more info of model selection of Hollow Rotary Actuator, please refer to the Model Selection Pages in Catalogue.

7. How to Install the Hollow Rotary Actuator?

Please refer to the Catalogue or contact our technical sales.

8. Why choose GIGAGER?

a, We have professional R & D team with core competitiveness assurance and rich engineering experience. In the past 10 years, we supply high quality product to clients who are famous in the world and China. Below are our part of clients.


b, GIGAGER keeps good communication and cooperation with the experts and enterprise from Chinese Taiwan and Japan for more than 10 years which accumulates deep technical precipitation.

c, Strong production ability and high efficiency supply chain, providing customers with very competitive price with good quality product.

d, We offer 24 hours professional technical and after-sale support.

e, We offer custom built service according to clients’ requirement.

f, Fast delivery time. For standard speed reducers, we have sufficient stock and can delivery to the customer shortly.



9. FAQ

Q1. How to choose a reducer which meets our requirement?
A: You can refer to our catalogue to choose the reducer or we can help to select the right model according to your requirement. For model selection, please contact our technical sales.

Q2. What information shall we give before placing a purchase order?
A: Please contact our technical sales and inform type of the reducer, ratio, input and output type, input flange, mounting position, and motor information etc.

Q3. Are you a manufacturer or trading company?
A: We are a manufacturer that mainly produce Speed Reducer. You are warmly welcomed to visit us.

Q4. What’s your Warranty Terms?
A: We provide 12 months free warranty since the date of delivery.
For more info, please see catalogue.

Q5. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery. And we accept the third party inspection before delivery.

Q6. What are your terms of payment?
A: We accept T/T and Alibaba Trade Assurance. In Alibaba Trade Assurance, we support payment method by Boleto, VISA, Master Card, e-Checking, Pay Later and T/T. You can choose the suitable way for payment.
We accept full payment before delivery.

Q7. How about your delivery time?
A: For standard product, we have sufficient stock, it shall be sent out in 3 days upon receiving your payment.
For mass production, it shall take 15-20 days for production and then sent out.

Q8. Do you need the local distributor?
A: We warmly welcome the local distributor for win-win cooperation. We initiated the international market strategy at the middle of 2018 which late than our china domestic market for more than 10 years.
Now, we are looking for the local company to be our distributor or exclusive distributor. For more details, please contact us.

Q9: How do you make our business long-term and good relationship?
A: We keep good quality and competitive price to ensure our customers benefit;
We respect every customer as our friend and we do business honestly no matter where they come from. 

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