Three bores self-tapping inserts are a new kind of fastener that strengthens the thread strength. It has the characteristics of “self-tapping”. It does not need to use the tap to machine the bottom hole thread. It only needs to pre-drill the bottom hole and then directly install it with the installation tool. Into, high installation efficiency, embedded in plastic, aluminum alloy, cast iron, copper and other soft materials, can form a higher strength internal thread hole.

Applications :

Self-tapping inserts have been widely used in the automotive industry, subway systems, military supplies, home appliances, construction machinery, business machinery, electronic products, engineering plastics, high-end furniture and other industries in many advanced countries. A lot of adoption. Especially in rail transit, it is used in large quantities to ensure that the screws of the track workpiece are not loose.

Features :

-Self-tapping inserts have self-tapping ability, and the base metal does not need to be tapped in advance, saving cost.

-Self-tapping inserts  and finished products have large contact faces and strong tensile strength. The products can be designed with lower strength materials.

- Self-tapping inserts have a repairing effect on the female thread of wear or crushing. The same screw can be used even with self-tapping braces.

- Self-tapping inserts are resistant to vibration and prevent loosening.

-Self-tapping inserts and the base metal have no clearance, and the base material also has good air tightness if it contains bubbles.

-Self-tapping inserts are easy and quick to install, only one assembly tool is required, the cost is low, and there is almost no defect rate.

Advantages :

-For the repair of the worn or broken female thread, the same screw can be used with the self-tapping sleeve.

-The self-tapping sleeve has self-tapping ability, and the base material does not need to be tapped in advance, saving cost.

- Self-tapping braces are easy and quick to install, only one assembly tool is required, and the cost is low, and there is almost no defect rate.

-The self-tapping braces are strong against vibration and can prevent loosening.

-There is no clearance with the base metal, and the base material also has good air tightness if it contains bubbles.

-It has a large contact surface with the finished product and can withstand strong pulling force. The product can be designed with lower strength materials.

Material & Finish :

-Stainless steel 303, passivated

-Case-hardened steel, zinc-plated, yellow chromated

-Brass

Technical Parameters ：

Dimensions in mm

Manual Insertion Process:

Manual installation with driving tool and tap wrench：

Emergency installation using screw and nut:

The manual insertion is usually carried out using the manual tool via the female thread or in case of the tools using the hexagon socket. You can of course also use power tools for the manual assembly. If doing so, it needs to be ensured that the rotatable sleeve is in the corresponding correct position.

Image 11.1/12.1

Thread the insert, cutting geometry (slit or bore) has to be pointing downward.Attention needs to be paid while doing so that the screw with nut does not face in the direction of the cutting geometry after locking with a counter nut, as the shavings are otherwise not discharged.

Image 11.2/12.2

Screw in the insert until approx. 0.1-0.2 mm underneath the surface of the work piece(during temporary assembly using screw and nut, the insert should be processed until flat). Vertical assembly must be ensured.

Image 11.3/12.3

Loosen the counter nut, otherwise the insert could possibly become unscrewed. Subsequently screw out the   screw/screw-in tool.

FQA

Q1: Are you trading company or manufacturer ?

A1: We are manufacturer since 2004 in Shen zhen ,China .

Q2: Do you have stock for items ?

A2: Yes , most of items are in stock for shippment .

Q3: How long is your delivery time?

A3: Generally it is 1day for stock item,10-15 days for custom items or big quantity over 50000 pcs .

Q4: Can you provide samples ? is it free or extra ?

A4: Yes, we could offer the sample for free charge but do not pay the cost of freight.

Q5. What about the payment terms?

A5: Generally 100% T/T in advance before shippment or mass production ,and we can also consult according to your requirement.

Q6: What's your advantage?

A6: The competitive prices, fast delivery and high quality. responsible-oriented employees strict tolerance, smooth finish and long- life performance.

Q7: What are your machining equipment?A7: CNC milling machines, CNC turning machines, stamping machines,grinding machines,automatic lathe machines, tapping machines, grinding machines,screw machines, cutting machines and so on.

Q8: How to guarantee the Quality of Industrial Parts?

A8: We have been in fastener field over 15 years with full experience. And there are 5 checks in the whole processing, We have IQC (incoming quality control), IPQCS (in process quality control section), FQC (final quality control) and OQC (out-going quality control) to control each process of industrial parts production.

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