| Material: | High Strength Steel |
|---|---|
| Type: | Chassis |
| Standard: | SGS |
| Application: | Sinotruk Steyr Axle Rear Axle 28/17 |
| Model No: | 199012340123 Dz9112340123 81455010102 |
| Parts: | Heavy Duty Truck Chassis Axle Parts Bolt & Screw |
| Samples: |
|---|
| Customization: |
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| Bolt Strength Grade | |
| Strength Grade | Level 4.8, 6.8, 8.8, 10.9 and 12.9 |
| Tensile Strength (Nm/mm²) | 400, 600, 800, 1000, 1200 |
| Yield Strength (Nm/mm²) | 320, 480, 640, 900, 1080 |
(1) The hardness after heat treatment is about HRC39-44.
(2) The yield strength ratio of bolt material is 0.9.
(3) The nominal tensile strength of bolt material reaches 1200MPa.
(4) The nominal yield strength of the bolt material reaches 1080MPa.
Correct selection and use of air impact wrench
Someone must ask whether the bolt will break or slip, doesn't it depend on the bolt itself? How to reduce breakage and slippage during installation? In fact, this has a lot to do with the operation method and the selection of the air impact wrench model. The premise of not being afraid of breaking the bolts is that you must first understand the quality grade of the bolts to be installed and the installation torque value to be used. Adjust or select the matching air impact wrench so as not to damage the bolts.
Unit conversion of torsion
According to 1Kgm=9.80665Nm, one kilogram is about 10Nm torque, (ie Nm) torque, 1KG force meter = 9.81Nm is about 10Nm, torque 3800 (Nm), ie 380 (KG/m).
Air impact wrench square head size: 1 (in/min) is 1 inch = 2.54 cm
Air consumption: 2040 (m3/min) is 2040 m3 / min
Idling speed: 4600 (r/min) is 4600 (r/min), r=speed
For example: BX-5083A air impact wrench, the working torque is 2200/Nm, and the maximum torque is 3100Nm (the maximum working torque is the torque generated when the bolt reaches the air impact wrench when the air pressure is sufficient) (Note: At this time, the air impact wrench is based on the maximum working torque, not the working torque, so the probability of bolt breakage and slippage will be increased at this time).
Damage to bolts caused by air impact wrench operation
1.After the bolt is tightened, the air impact torque of the bolt can not be started, and the sound of "bang, bang, bang" stops. At this time, the air impact wrench works according to the maximum working torque, which will cause damage to the bolt.
2.The inner hole of the nut sleeve is not concentric with the square head of the air impact wrench (not in a working center point).
3.The model of air impact wrench is improperly selected, and the excessive torque has exceeded the strength of the bolt itself.
4.Without proper understanding of bolt grade strength, and the wrong torque of air impact wrench is used for installation.
5.When holding air impact wrench to install the bolt, the posture is incorrect and the air impact wrench is inclined, resulting in uneven force on the nut and the screw, causing the screw and nut to slide and break.
Q1. Are you a factory or trading company?
We are a factory integrating research, development, production and sales.
Q2. What are the advantages of your products?
We support product customization to meet customer needs for special products. We can strictly control the products from raw materials to production, processing, product quality inspection, delivery, packaging, etc., and provide customers with high-end products and the most advantageous prices.
Q3. How about products price?
We are a factory, all products are direct sale at factory price. For the same price, we will provide the best quality; for the same quality, we have the most advantageous price.
Q4. What is your terms of packing?
We have branded packaging and neutral packaging, and we can also do what you want with authorization. This is flexible.
Q5. How to guarantee your after-sales service?
Strict inspection during production, Strictly check the products before shipment to ensure our packaging in good condition. Track and receive feedback from customer regularly. Our products warranty is 365 days.
Each product provides quality assurance service. If there is a problem with the product within the warranty period, the customer can negotiate with us in detail about the related claims, and we will do our best to satisfy the customer.
Q6. How can I accurately buy the products I need?
We need accurate product number, If you can't provide product number, you can send us your product picture, or tell us your truck model, engine name plate, and so on. we will
determine exactly what you need products.
Q7. Do you accept third party inspection?
Yes.we do
Q8. How about your delivery time?
Generally, it will take 3 to 10 days after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.
Q9. What are your brand agency conditions and advantages?
After we sign an agent in one city, we will not sign a second company to protect the agent's brand advantage and price advantage. And we will help the agent develop customers and solve all kinds of difficult and miscellaneous problems about products.
Q10. What is your terms of payment?
By TT or LC. We'll show you the photos of the products and packages before you pay the balance.
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