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CNC Valve Groove & Tip Radius Grinding Machine CNC Valve Groove & Tip Radius Grinding Machine

Valve Groove & Tip Radius Grinding Machine is special purpose machine for engine valve. It is suitable for grinding groove and tip radius of inlet valve and exhaust valve. Using CBN wheel. Driven by servo control system. more accuracy.

Wheel :
  • CBN Wheel
Spindle :
  • Mechanical Spindle
Delivery time :
  • 90 working days
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  • Model: MUG-A
  • Brand: Tianzhijiao
  • Code: 8460909000
  • Product Description
  • Video of double station grinding machine
  • FAQ

CNC Valve Groove & Tip Radius Grinding Machine

Product Description

Valve Groove & Tip Radius Grinding Machine is special purpose machine and used for grinding groove and tip radius of engine valve. Ranging from Stem diameter: 5 mm to 8 mm, Head diameter: 20 mm to 50 mm, Overall length: 80 mm to 150 mm. The machine can be single production and also can be connection production. our equipment is continually upgraded with latest technologies in processing engine valve. 

We have two types this machine. Single station grinding machine and double station grinding machine. Double station grinding machine is with the same function with single station grinding machine. But it can process 2 PCS engine valve at the same time. Suitable for mass production. 


Forming grinding: Stem end chamfering and groove can be processed at the same time and guarantee the consistency of products. 

Technical Parameter 

Before Processing 
Processing range  Stem Diameter: 5-8 mm, Head diameter: 20-50 mm, Length: 80-150 mm 
Material  21-4N, 4Cr10Si2Mo, Imported: SUH:3,SUH:35, Hardness: 25-45 HRc
Stem Run out : 0.02 mm, Head run out : 0.05 mm
Grinding allowance 0.5-3 mm
After processing 
Processing accuracy 
Groove accuracy  Within ±0.015 mm, Sampling and using special inspection tool to measure 50 pieces
Position of groove  Within ±0.02 mm,Sampling and using special inspection tool to measure 50 pieces
Roughness  Within Ra 1.6
Cycle time  6s/piece ( according to valve size )
Air Pressure 

0.4-0.6 Mpa 

Water diacharge 
CBN Wheel 
Wheel Speed 
80-120 m/s 
Machine Size 
2000*2100*2000 mm
Machine Weight 

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


Valve Groove & Tip Radius Grinding Machine is special purpose machine for engine valve. it is used to process engine valves (inlet valves and exhasut valves) in lawn machine, cars, motorcycles, trucks, and other engine valves.



How does our machine work?

For processing groove, tip chamfer and end face, we have two types machine. single station and double station. 

Double station grinding machine can process 2 pcs engine valve at the same time, reducing the efficiency and labor cost. Suitable for mass production. 

Video of double station grinding machine 


Q: What is the payment terms?

A: 40% in advance with the PO, the balance paid before shipment 

Q: What is the delivery time?

A: 90 working days after we receive the advanced payment

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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