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CNC Valve Cut Off Machine CNC Valve Cut Off Machine

Valve cut off machine is used for cutting off the stem of engine valve and to control the total length. Using CBN Wheel to cut. High precision with high efficiency

Wheel :
  • CBN Wheel
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  • Model: VEC-380
  • Brand: Tianzhijiao
  • Code: 8462319000
  • Product Description
  • FAQ

CNC Valve Cut Off Machine

Product Description

Valve Cut off Machine is special purpose machine for engine valves. Using CBN high speed wheel to cut the stem of engine valve in order to control the total length of engine valve. Ranging from Stem diameter: 5-8 mm, Head diameter: 20-50 mm, overall length: 80-150 mm. Valve cut off machine can be single production and also can be connection production. Our equipment is continually upgraded with latest technologies in processing engine valve.

Technical Parameter

Before Processing 
Processing range Head diameter: 20-50 mm, stem diameter: 5-8 mm, overall length: 80-150 mm 
Raw Material 21-4N, 4Cr10Si2Mo, WNB, Imported: SUH:3, SUH:35; Hardness: 25-45 HRC

Grinding allowance  0.5-5 mm ( it is up to grinding wheel )
After Processing 
Processing accuracy  Length accuracy  Within ±0.03 mm, Sampling and using special inspection tool to meausre 50 pieces, CPK≥1.33
Square stem end- stem  Within 0.03 mm, Sampling and using special inspection tool to measure 50 pieces, CPK≥1.33
Surface treatment  Within Ra 2.5, CPK≥1.33
Cycle time  6s/piece ( according to the valve size ) 
Wheel size 
CBN Wheel  380*160*1.8 mm
Wheel speed  m/s  80-140

Main Features

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

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

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

4) Speed of CBN Wheel: 80-140 m/s 

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

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

7) With automatic loading & Unloading mechanism.

8) The frame can meet different size valve and easy to adjust

9)  With water recovery apparanus device at the blanking way to prevent the fluid from leaking

10) With alarm device


Valve Cut off Machine 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.

Packaging & Delivery

1) Packaging: Using standard export wooden case.

2) Delivery time: 60-90 working days after we receive down payment (delivery time is up to the production time of components)

3) Shipping Port: Shanghai Port



How does our machine work?


Q: What is the payment terms?

A: 30% T/T in advance, the balance paid before shipment

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: How long is the delivery?

A: 90 working days after we received the down payment.

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.

Installation and maintenance

We have a training for how to operate and install. Training place in our factory. We also can go to the factory of customer to install. the charges are paid by the customer.


All machines have one year warranty. Within the warranty period, all maintenance is free except for wearing parts. If the damage is caused by wrong operation, We can provide maintenance but the cahrges are paid by customer. 


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