• Rotary Encoder Motor Speed Encoder
  • Rotary Encoder Motor Speed Encoder
  • Rotary Encoder Motor Speed Encoder
  • Rotary Encoder Motor Speed Encoder
  • Rotary Encoder Motor Speed Encoder

Rotary Encoder Motor Speed Encoder


Product origin :Jilin, China

Delivery time :7 working days

Supply capacity :3000 pcs per week

Servo motor and encoder are two important parts in servo motor control system. This rotary encoder is small in size. But its resolution is high. Single turn resolution reaches to 21 bit; multi-turn resolution reaches to 32 bit max. The motor encoder is necessary part of servo motor. The encoder resolution decides the precision of servo motor angle, position and speed measurement.
Incremental type motor encoder has been widely applied in servo motor system. But for high resolution requirement industry, absolute type servo motor encoder is required more and more.

Model: NVA48T Small Rotary Encoder Motor Speed Encoder SSI Output

Small Rotary EncoderRotary Encoder


1. Single turn and multi-turn absolute type servo motor encoder.
2. Single turn resolution to 21bit; multi-turn resolution to 32 bit.
3. International SSI protocol.
4. Compact, ultra-thin design,high precision.
5. Integrated optoelectronic components.
6. Anti-interference ability.

Basic Specifications:

External Diameter


Shaft Diameter

Through Hole8mm/Taper hole 9mm

Slew Speed


Shaft Load


Operating Temperature

-20 °C(-40 °C)- +85°C

Protection Class



Side Entry Cable

Supply Voltage


Output Model


Frequency Response


Current Requirement


Output Pulse No.

single turn 21 bit;multi turn 32 bit

Output Phase

Gray code/Binary code

Mechanical Drawing

Motor Speed Encoder

Small Rotary Encoder

Company Building

Roundss was founded in 2006. It is a professional rotary encoder manufacturer with 11000 sq factory. The headquarter is in 

Changchun, which is the photoelectric industry base of China. Roundss has 4 sales branches, 30 full-time sales staff and 18 

agents in China. We will provide the quality optical encoders and good service to customers in fast response.

Factory Show

Roundss has 11000 sq meter factory including machining workshop and dust free assembly workshop. The automatic 

assembly line was developed by Roundss, which is the first in encoder industry. We have 8 production lines: universal 

incremental encoders; absolute encoders; manual pulse generator; draw wire sensor; magnetic ring encoder; gear tooth

encoder; servo motor encoder; flexible couplings. We could provide 3000pcs encoders for one week. For every encoder

before leaving factory, it must pass two times of singal inspections.


All encoders passed CE certificate. Some encoders like MPG, handwheel are RoHs compliant. Roudss spends 6% of annual 

income on science and technology activities and R&D. Now we have got more than 40 national patents.

International Exhibitions

Each year, ROUNDSS attends around 10 international exhibitions, such as IMTS, JIMTOF, EMO, SIMTOS, SPS IPC Drives 

and so on. The rotary encoders are welcomed by customers around the world. Now encoder products have been exported 

to more than 50 countries.


Roundss has 12 agents around the world. Haas, Beijing-Fanuc and Bosch group are all our partners. Wide selection of 

encoder products is available. The incremental encoder and MPG are our star products. Roundss also supply the customized

encoder service. We welcome partners to visit our company to talk about cooperation details. 

Group Activity

ROUNDSS has about 150 employees. We pay attention to the growth of each partner, respect employees, care for employees,

and improve employees. Roundss group will devoted ourselves in encoder industry and supply the best rotary encoders to you!

Our Service


1. The questions about the encoder will be answered within 24 hours.

2. One-stop solution will offer to meet all your requirements on budget, designing and shipment.

3. We can offer the information of dealer in your market if you want to contact them directly.

4. Update the procession of manufacturing.

5. Warranty 18 months: Free replacement of defective products within 18 months.




Q1:Can I have a sample for testing?

A: Actually we have a very good price principle, when you make the bulk order then cost of sample will  be return to 

you. The price is the same for 1-30 sets including the sample

Q2:Can I add my logo on the encoder ?

A:Yes,OEM and ODM are available for us. But you should send us the trademark authorization letter.

Q3:How can i get the after-service?

A:We will send you the spare parts by free if the problems caused by us. If it is the men-made problems, we also send 

the spare parts,but you should pay for the repair fee and shipping cost.

Q4 :Do you have inspection procedures for encoder ?

A:100% self-inspection before packing

Q5:Can I have a visit to your factory before the order?

A: Sure,welcome to visit our factory.

Here is our factory address: No.1666, Ya’an Road, North Lake District, Chanchun, China

We can pick you up at the airport.


Rotary Encoder

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