Product Description


HDL-308 is mainly for complex formation. The top drifter has high power-vibration, it is able to drill in hard rock without air compressor or DTH hammer.



  If you need more detail, pls kindly send email to us

Specifications HDL-308
Hole diameter(mm) φ100~φ300
Hole depth(m) 150~180
Hole angle(°) -30~105
Rod diameter(mm) Φ73,Φ89,Φ102,Φ114,Φ146,Φ168,Φ194,Φ219
Gripper diameter(mm) Φ73~Φ300

Construction Site

Product Show


1. Top Drive Drilling Head-suitable for all kinds of soil condition
HDL-300 drilling rig rotary head HD-250;HDL-308 drilling rig rotary head HD-100X and HQ350

2. Fitted with imported hydraulic system–more stable system.

3. Swiveling console-more convenient for operation, more flexible and safer. (HDL-300 only)

4. Omnidirectional variable angle mechanism-more flexible, suit for many kinds of projects.

5. Vertical big turn plate- -more convenient for tunnel shied construction.

6. 300mm opening diameter clamp- suitable for big hole drilling construction.

7. Remote control- more safer.


1. Lifting arm swings in angle of left and right

2. Lifting arm swings in angle of up and down(HDL-308 has no 20 function)

3. Vertical turntable in angle of left and right

4. Mast in angle of left and right

5. Lifting tower swings in angle of up and down

6. Sliding stroke is in up and down direction(HDL-300 only)



1. With large impact energy in the top drive drilling head, that can achieve impacting drilling without using DTH hammer and air compressor, has higher working efficiency and better result.
2. With omnidirectional, multi-angle adjustment, which can meet many kinds of drilling angle requirement, more convenient for adjustment.
3. The impact energy transmit on drilling tools from inside to outside, which reduce drill sticking, hole collapsing, drill bit being buried or other incidents, and make the construction safer and with lower cost.
4. With large torque, high rotary speed, large impact energy, that makes this machine able to applied in wider soil layers, especially in sandy CZPT layer, crushed rock layer, stone soil, sandy layer, and other easily collapsing layer that need impact drilling. It has high efficiency of drilling speed and high quality of hole. When the water content is too high in the layer, in this case, the DTH hammer is not working, and the technology this machine process becomes the only choice.
5. With movable console, which is easy to operate and convenient for operators to view the drilling hole.
6. This machine is mainly applied in: foundation supporting, slope supporting, micro piling drilling, tunnel shied, and many kinds of hole guiding construction, and other engineering.

 Production Flow

About us


   HangZhou CZPT CONSTRUCTION MACHINERY CO.,LTD. is a construciton machinery manufacturer which integrates of scientific researching, producing and sales, especially in the R&D and product customization for marketing demands. The drilling rigs are major in foundation construction, including high-speed railway,city subway, tunnel, basement under high-rise buildings, water-proof construction,etc. By different techniques, we have Multifunctional Anchor Drilling Rig (HDL Series), Anchor Drilling Rig(MXL, MX Series), Jet grouting Drilling Rig (SJ, SJL Series). All of them are the essential engineering machines in the construction projects.



Packaging and Transportation

Factory show




Our products have been exported to many oversea countries such as Malaysia, Vietnam, Singapore, Iran, England, Canada, Kampuchea, Indonesia and Africa.
Meanwhile, welcome join us to be our agents and create the overseas markets.



Q: Are you original manufacturer?
A: Yes, CZPT is manufacture in anchor and jet grouting machinery in China for more than 40 years.


Q: Which payment terms are available to us?
A: T/T term or L/C term. On T/T term, 30% down payment is required in advance, and 70% balance shall be settled before shipment. On L/C term, a 100% irrevocable L/C without “soft clauses” can be accepted.


Q: Which Incoterms 2571 terms can we work?
A: CZPT is a professional and international company, accept all Incoterms 2571 terms, normally we work on FOB, CIF, CFR, CIP.


Q: How long will the delivery time take?
A: Normally it will take about 30-40 days to produce the ordered machines.


Q: How about your sales performance in China?
A: We have more than 2000 active customers in China. The leading market share of same function products in domestic fields.

After-sales Service: Video Technical Support, Online Support
Warranty: 1 Year
Certification: ISO 9001:2000, ISO 9001:2008, ISO 14001:2015
Condition: New
Drill Hole Diameter: φ100~φ300
Drill Hole Depth: >150m


The Parts of a Gearbox

There are many parts of a Gearbox, and this article will help you understand its functions and components. Learn about its maintenance and proper care, and you’ll be on your way to repairing your car. The complexity of a Gearbox also makes it easy to make mistakes. Learn about its functions and components so that you’ll be able to make the best choices possible. Read on to learn more. Then, get your car ready for winter!


Gearboxes are fully integrated mechanical components that consist of a series of gears. They also contain shafts, bearings, and a flange to mount a motor. The terms gearhead and gearbox are not often used interchangeably in the motion industry, but they are often synonymous. Gearheads are open gearing assemblies that are installed in a machine frame. Some newer designs, such as battery-powered mobile units, require tighter integration.
The power losses in a gearbox can be divided into no-load and load-dependent losses. The no-load losses originate in the gear pair and the bearings and are proportional to the ratio of shaft speed and torque. The latter is a function of the coefficient of friction and speed. The no-load losses are the most serious, since they represent the largest proportion of the total loss. This is because they increase with speed.
Temperature measurement is another important preventive maintenance practice. The heat generated by the gearbox can damage components. High-temperature oil degrades quickly at high temperatures, which is why the sump oil temperature should be monitored periodically. The maximum temperature for R&O mineral oils is 93degC. However, if the sump oil temperature is more than 200degF, it can cause seal damage, gear and bearing wear, and premature failure of the gearbox.
Regardless of its size, the gearbox is a crucial part of a car’s drivetrain. Whether the car is a sports car, a luxury car, or a farm tractor, the gearbox is an essential component of the vehicle. There are two main types of gearbox: standard and precision. Each has its own advantages and disadvantages. The most important consideration when selecting a gearbox is the torque output.
The main shaft and the clutch shaft are the two major components of a gearbox. The main shaft runs at engine speed and the countershaft may be at a lower speed. In addition to the main shaft, the clutch shaft has a bearing. The gear ratio determines the amount of torque that can be transferred between the countershaft and the main shaft. The drive shaft also has another name: the propeller shaft.
The gears, shafts, and hub/shaft connection are designed according to endurance design standards. Depending on the application, each component must be able to withstand the normal stresses that the system will experience. Oftentimes, the minimum speed range is ten to twenty m/s. However, this range can differ between different transmissions. Generally, the gears and shafts in a gearbox should have an endurance limit that is less than that limit.
The bearings in a gearbox are considered wear parts. While they should be replaced when they wear down, they can be kept in service much longer than their intended L10 life. Using predictive maintenance, manufacturers can determine when to replace the bearing before it damages the gears and other components. For a gearbox to function properly, it must have all the components listed above. And the clutch, which enables the transmission of torque, is considered the most important component.


A gearbox is a fully integrated mechanical component that consists of mating gears. It is enclosed in a housing that houses the shafts, bearings, and flange for motor mounting. The purpose of a gearbox is to increase torque and change the speed of an engine by connecting the two rotating shafts together. A gearbox is generally made up of multiple gears that are linked together using couplings, belts, chains, or hollow shaft connections. When power and torque are held constant, speed and torque are inversely proportional. The speed of a gearbox is determined by the ratio of the gears that are engaged to transmit power.
The gear ratios in a gearbox are the number of steps a motor can take to convert torque into horsepower. The amount of torque required at the wheels depends on the operating conditions. A vehicle needs more torque than its peak torque when it is moving from a standstill. Therefore, the first gear ratio is used to increase torque and move the vehicle forward. To move up a gradient, more torque is required. To maintain momentum, the intermediate gear ratio is used.
As metal-to-metal contact is a common cause of gearbox failure, it is essential to monitor the condition of these components closely. The main focus of the proactive series of tests is abnormal wear and contamination, while the preventative tests focus on oil condition and additive depletion. The AN and ferrous density tests are exceptions to this rule, but they are used more for detecting abnormal additive depletion. In addition, lubrication is critical to the efficiency of gearboxes.


Daily maintenance is a critical aspect of the life cycle of a gearbox. During maintenance, you must inspect all gearbox connection parts. Any loose or damaged connection part should be tightened immediately. Oil can be tested using an infrared thermometer and particle counters, spectrometric analysis, or ferrography. You should check for excessive wear and tear, cracks, and oil leaks. If any of these components fail, you should replace them as soon as possible.
Proper analysis of failure patterns is a necessary part of any preventative maintenance program. This analysis will help identify the root cause of gearbox failures, as well as plan for future preventative maintenance. By properly planning preventative maintenance, you can avoid the expense and inconvenience of repairing or replacing a gearbox prematurely. You can even outsource gearbox maintenance to a company whose experts are knowledgeable in this field. The results of the analysis will help you create a more effective preventative maintenance program.
It is important to check the condition of the gearbox oil periodically. The oil should be changed according to its temperature and the hours of operation. The temperature is a significant determinant of the frequency of oil changes. Higher temperatures require more frequent changes, and the level of protection from moisture and water reduces by 75%. At elevated temperatures, the oil’s molecular structure breaks down more quickly, inhibiting the formation of a protective film.
Fortunately, the gear industry has developed innovative technologies and services that can help plant operators reduce their downtime and ensure optimal performance from their industrial gears. Here are 10 steps to ensure that your gearbox continues to serve its purpose. When you are preparing for maintenance, always keep in mind the following tips:
Regular vibration analysis is a vital part of gearbox maintenance. Increased vibration signals impending problems. Visually inspect the internal gears for signs of spiraling and pitting. You can use engineers’ blue to check the contact pattern of gear teeth. If there is a misalignment, bearings or housings are worn and need replacement. Also make sure the breathers remain clean. In dirty applications, this is more difficult to do.
Proper lubrication is another key factor in the life of gearboxes. Proper lubrication prevents failure. The oil must be free of foreign materials and have the proper amount of flow. Proper lubricant selection depends on the type of gear, reduction ratio, and input power. In addition to oil level, the lubricant must be regulated for the size and shape of gears. If not, the lubricant should be changed.
Lack of proper lubrication reduces the strength of other gears. Improper maintenance reduces the life of the transmission. Whether the transmission is overloaded or undersized, excessive vibration can damage the gear. If it is not properly lubricated, it can be damaged beyond repair. Then, the need for replacement gears may arise. However, it is not a time to waste a lot of money and time on repairs.

China wholesaler Hdl-308 High Quality Rated Output Torque Diesel Drilling Rig   gearbox definition		China wholesaler Hdl-308 High Quality Rated Output Torque Diesel Drilling Rig   gearbox definition
editor by CX 2023-05-26

Torque Arm

As one of the torque arm manufacturers, suppliers, and exporters of mechanical products, We offer torque arms and many other products.

Please get in touch with us for details.

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