+86-18072832111
Home / Products

About Us

Hangzhou Hao Gong Tools Co., Ltd.

Hangzhou Hao Gong Tools Co., Ltd. Mini Ratchet Wrench Set Manufacturers and Hand Tool Sets Suplliers. Hangzhou Hao Gong Tools Co., Ltd. (Hangzhou Source Tool Machinery Co., Ltd.) is a combination of industry and trade enterprises, committed to the production of torque wrenches, ratchet wrenches, socket tool sets, and other auto protection and hand tools products, used in automobile repair, maintenance, energy construction, rail transit, machinery manufacturing, and many other industries. Domestic and foreign partners will receive Haogong quality. We will rely on a rigorous work attitude, strong sales channels, and perfect after-sales service, and continue to provide efficient and high-quality services for partners worldwide.

Certificate Of Honor

  • Honor
  • Honor
  • Honor
  • Honor
  • Honor
  • Honor
  • Honor
  • Honor

News

Message Feedback

Products Industry knowledge

What is the ideal torque range for automotive applications when selecting a torque wrench set, and how does it vary for different types of bolts and fasteners?
The ideal torque range for an automotive torque wrench set can vary depending on the specific application and the types of bolts and fasteners being used. In general, torque wrenches are used to apply a specific amount of torque to fasteners, which is critical to ensure that they are properly tightened without over-torquing or under-torquing. 
When tightening lug nuts or wheel bolts, the recommended torque range typically falls between 80 and 140 foot-pounds (108 to 190 Nm). This can vary slightly depending on the specific vehicle and the size of the fasteners.
Torque wrenches for engine components like cylinder head bolts, connecting rod bolts, and main bearing caps require a higher torque range. It can range from 20 to 250 foot-pounds (27 to 339 Nm), depending on the specific engine and fastener size.
Suspension components, such as ball joint fasteners and control arm bolts, generally fall within the range of 40 to 120 foot-pounds (54 to 162 Nm). Chassis components may vary, so it's important to consult the vehicle's service manual for specific torque specifications.
Smaller fasteners, like those used for interior trim, plastic covers, or electrical components, may require torques in the range of 5 to 30 foot-pounds (7 to 41 Nm).
Torque values for exhaust and brake components vary, but they often fall within the range of 15 to 70 foot-pounds (20 to 95 Nm).
It's crucial to consult the vehicle's service manual or the manufacturer's recommendations for specific torque values. Using the correct torque specifications is essential to ensure safety, and prevent over-torquing (which can lead to damaged threads or components) and under-torquing (which can result in loose fasteners).
In the construction industry, what are the primary considerations when choosing a torque wrench set for securing structural bolts in buildings and bridges?
When choosing a torque wrench set for securing structural bolts in buildings and bridges in the construction industry, there are several primary considerations to keep in mind to ensure the safety, integrity, and reliability of the structures. 
Precision is crucial in structural construction, and torque wrenches must be highly accurate. Look for torque wrenches with low tolerances and the ability to maintain calibration over time. Regular calibration checks and adjustments are essential to ensure accurate torque application.
The torque wrench set you select should cover the range of torque values required for the specific structural bolts used in your construction project. Structural bolts may vary significantly in size, and it's important to have torque wrenches that can handle the required torque levels.
There are various types of torque wrenches, such as click, beam, and electronic torque wrenches. In the construction industry, electronic torque wrenches are often preferred due to their digital readouts and ability to store torque data. However, the choice of type depends on personal preference, job requirements, and budget considerations.
Consider the length and reach of the torque wrench, as this can impact your ability to access and apply torque to bolts in tight or hard-to-reach spaces. Longer wrenches may be necessary for certain applications in construction.
Construction sites can be harsh environments, so torque wrenches must be durable and reliable. Look for tools made from high-quality materials, with sturdy construction that can withstand the demands of the job site.
Ensure that the torque wrench set complies with relevant industry standards and specifications. For structural construction, standards such as the American Institute of Steel Construction (AISC) may provide guidance on torque values and torque wrench requirements.
Ultimately, the choice of a torque wrench set for securing structural bolts in construction depends on the specific requirements of the project, the types of structural bolts being used, and the safety and quality standards that must be met. Consulting with structural engineers and following industry guidelines is important to ensure the correct selection and use of torque wrenches in construction applications.