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Double Station Grinding Machine Double Station Grinding Machine

Double Station Grinding Machine is special purpose machine for engine valve groove and stem end chamfer. It can process 2 PCS engine valve at the same time. Using CBN wheel to process. Increase the quantity and efficiency. Suitable for mass production.

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  • Model: MUG-A-2
  • Brand: Tianzhijiao
  • Code: 8460909000
  • Product Description
  • FAQ

Double Station Grinding Machine 

Product Description 

Double station grinder is special purpose machine for engine valve. It can grind groove and tip radius of engine valve. And it can process two pieces valve at the same time. Ranging stem diameter from 5 mm to 8 mm, head diameter from 20 mm to 50 mm, overall length from 80 mm to 150 mm. our euipment is continually upgraded with latest technologies in processing engine valve. Our machines can be single production and also can be connection production.


  • Forming grinding: Stem end chamfer and groove can be processed at the same time and guarantee the consistency of products;

  • The machine can process 2 PCS engine valve at the same time. suitable mass production;

Technical parameter

Before processing 
Processsing range  Stem diameter: 5-8 mm, Head diameter: 20-50 mm, Overall length: 80-150 mm
Raw material 21-4N,WNB,4cR10Si2Mo, Imported: SUH:3, SUH:35, Hardness: 25-45 HRC

Run out of stem: 0.02 mm, Run out of head top: 0.05 mm
Grinding allowance 
0.5~3 mm 
After Processing 

Processing range 
groove diameter accuracy  within ±0.02 mm, Sampling and using special inspection tool to measure 50 pieces
groove position  within ±0.02 mm, Sampling and using special inspection tool to measure 50 pieces
Roughness  Ra 1.6
Cycle time 
8s/2 pieces 
Grinding wheel 
CBN Wheel
Wheel speed 
80-120 m/s 

Main Features

  • HT250 machine bed and feeding slider, tempering heat treatment to eliminate stress and it is not easy to deformation.

  • Feeding of parts is controlled by double servo motor to achieve the action control of the amount of cutting and automatic cycle.

  • Adjustment the amount of cutting is controlled by touch screen. can set permission passward after commission.

  • Speed of CBN Wheel: 80-140 m/s 

  • Feed guide rail, slider and ball screw are lubricated automatically by electrical filling pupm.

  • All sealed cover except for loading & unloading parts (We can install safety door lock system, it is up to the customer needs).

  • With automatic loading & Unloading mechanism.

  • The rail can meet different size valve and easy to adjust


Double station grinder is special purpose machine for engine valve. it is used to process engine valves (inlet valves and exhasut valves) in cars, motorcycles, trucks, and other engine valves.


Q: What's the payment ? 

A: 40% Payment in advance, 60% paid before shipment

Q: How long is the delivery time ?

A: 90 Working days after we receive PO and advance payment.

Q: How long is the warranty time ?

One year 

Q: What is the capacity of engine valve production line?

A: The capacity of this line is 3500~4000 pieces/8 hour. 7000~8000 pieces/2 shaft/day. The real capacity is up to the size of engine valve and the skill of operator.

Q: How Many people are needed from raw material to ready valve?

A: We can provide completely engine valve production line from raw material to ready valve. We can alsp provide technical support for processing engine valve. it will need 15~20 people for this line. Our machining line just need 2~3 people. (it is up to the skill of operator).

Q: What can we do for customer?

A: Firstly, we are professional manufacturer for cnc engine valve grinding machine. We have more than ten years experience in processing engine valve grinding machine. Our technology adapt Japan and Taiwan technology and through many years innovation, the technology has mature.

Now, we have successfully developed fully automatic engine valve production line. And also put into use. Get good praise from our customer.
1. We can set up complete automatic engine valve production line according to customers needs.
2. We can make upgrade proposal according to customer real conditions.

3. Provide technical training for how to operate and install. in our company. of cause, it's free.
4. All machines have one year warranty. Within warranty period, Any questions except for man-made damage we offer the cost.
5. We can set up operation standard, technical guidence.


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