Ball Head Screw

The ball head screw should have a precise end pressure, by minimising the thickness of the bushing pins, using the longest possible quality spring, which will reduce spring fatigue and increase their life and ease of installation. The height of the ball head projection from the plunger body must be uniform for each plunger.

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The ball head screw should have a precise end pressure, by minimising the thickness of the bushing pins, using the longest possible quality spring, which will reduce spring fatigue and increase their life and ease of installation. The height of the ball head projection from the plunger body must be uniform for each plunger.

Precise machining controls and rigorous inspection procedures must ensure that the maximum dimensional difference between the projection height of each plunger head does not exceed 0.1mm, and in some sizes must not exceed 0.05mm. Although they can be fitted with a screwdriver or Allen key, most experts recommend using a special spring plunger spanner, especially for novices.

Using the wrong tool runs the risk of over-compressing the spring and damaging it. As any technician knows, you should always use the correct tool for the job. The biggest danger when installing plunger springs is using too much torque. Although they are like bolts or screws, their bodies are hollow and there is a limit to the amount of force they can tolerate.

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Prince fastener production process

 

Basic concepts of Prince Fastener screw production

1、Prince Fastener Manufacturing screw can be divided into: cold heading, hot machining (turning, milling, etc.)
2、Cold heading is the use of plastic metal, by using cold mechanical pressure or drawing, reaches the metal solid deformation of.
3、Hot upsetting is the material after heating and pressure processing make the shape of the material to meet the
designrequirements.
4、Prince Fastener Machining is a small batch of special or special bolts of the six corners of the head is turned into after the milling.
5、 Screw bolt thread: mechanical and manual threading, similar to die.
6、 Milling tail: generally completed by the end of the Prince Fastener cutting machine.
7、 The difference between cold and hot upset: cold heading bolts` surface are more beautiful, dozen red bolt surface oxide skindoes not look good; cold heading high production is efficiency; general Prince Fastener M24 bolts will need to play red;

Analysis of the causes of the phenomenon and the causes of the forming process

1、Eccentric: two red and improper installation and adjustment machine.
2、Minow: a poor installation and improper Prince Fastener adjustment machine at.
3、Head is not round: the choice of a die or a punch forming is not enough.
4、Play the mode of crack: crack or die R angle, so that the model is hit by the two collision.
5、Head double: bad punch.
6、Flash: a bad, punching molding is mainly between punch and die hole clearance is too large or too short by red bars.
7、Crack angle: the punch needle burst or two punch and punch is not heavy.
8、Head cracking: material, or a die using error (such as pan head Hexagon washer head of a die), and lubricating oil.

Analysis of adverse phenomena and causes of common rolling

1、Processing crack: tooth plate and adjust the Prince Fastener old machine.
2、Blunt tail: the machine is not properly adjusted, the tooth plate is too old.
3、Crooked tail: the control screw on the seat board seat is too tight.
4、Tail: tooth wear plate and improper adjustment machine.

Prince fastener production process

We can manufacture and customize all types of fasteners for a wide range of industries

Prince Fastener Manufacturing is committed to serving world’s major distributors, wholesalers, retailers, enterprises , and terminal customers, and can customize all kinds of fasteners, non-standard parts according to various requirements of  customers to provide overall supporting solutions for customers in different industries and makes customers to achieve convenient and fast” One-stop fastener purchasing”experience

We can manufacture and customize all types of fasteners for a wide range of industries

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Prince Fastener own advanced manufacturing equipments introduced from Taiwan such as Head Making machines, Thread Rolling machines, Net Furnace and examining machines like Micro Hardness Tester and Microstructure Tester. We can provide the products you want with good qualities and competitive prices!

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FAQ

Q:The quality of your Drywall screw for metal?

A:Prince fastener has advanced production and testing equipment .Every products will be 100%
inspected by our qc department before shipment

Q: Are you trading company or manufacturer of Drywall screw for metal?
A:Prince fastener is a factory with 30 years of manufacturing experiences in Shanghai,China.

Q: What is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to
quantity.

Q: Do you provide Drywall screw for metal samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge and customers only afford the freight costs.

Q: What is your terms of payment ?
A: 30% T/T in advance ,balance before shippment.

Q: Why choose us?
A: 1) Reply you in 24 working hours.
2)Experienced staffs would like to answer all your questions in time.
3) Customized design is available. ODM&OEM are welcomed.
4)Special discount and protection of sales are provided to our consumers.
5) Prince fastener can provide free sample, consumer should pay the freight first, and the expensive sample cost will be added in the next order.
6) As an honest exported seller, Prince fastener always use professional factory, quality quotation, good service, skilled
technicians to ensure our products to be finished in high quality and stable feature.

Q:How about your price?
A:Quality products with reasonable price. Please give me a inquire, we will quoted you a price for you refer at once.

Q:What kind of products do your factory manufacturing?
A:Our main products are: drywall screw,chipboard screw, machine screw,self tapping screw,self drilling screw,Non/standard
screws,Engineering fastener(High strength bolts;Nuts;Washers;Anchor),Stainless steel screws,Self Drilling Screw, Self Tapping Screw, Thread Rolling Screw, Thread Cutting Screw, Machine Screw, Concrete Screw, Roofing Screw,
Drywall Screw, Particle Board Screw, Chipboard Screw, Construction screws, Coach screws, Lag screw, Wood Screw, Euro
Screw,Collated Screw, Furniture Screw, Sems Screw, Thumb Screw, Wing Screw, Phillips Head Screw, Set screws, Metric set screws,Sheet metal screws, Eye screw, Security head screw

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