This should be fully considered when designing the pitch and center of the nylon gear. The hygroscopicity of acetal is much weaker than that of nylon, and volume expansion is less pronounced under the same environment. However, each material has its advantages, but also has its shortcomings; when the nylon absorbs moisture, the load bearing capacity is reduced and the impact strength is increased; the acetal changes little in a humid environment, but is brittle and not resistant to impact.
Gear Design The design of the plastic gear is basically the same as that of the metal gear, but the root should be a rounded corner formed by a smooth curve. Another difference between metal gears and plastic gears is the way in which the teeth enter the mesh. Under heavy load, the plastic gear bends more sharply than the metal gear, and the teeth that enter the mesh become unconcentric at the same time, and the tops are embedded with each other. The size calculation of the gear size plastic gear is basically the same as the metal gear.
Casting structure design The casting structure design of plastic gears should also be reasonable. Linearists often use linear ribs or spokes to reinforce the strength of the plastic part, but these features may result in uneven shrinkage, resulting in elliptical or non-circular gears; the solution is to use a web or rim instead of the support ribs. In order to save weight-reducing holes in the material, the parts can be shrunk, resulting in uneven bonding wires and weakening the gears. The bond line is formed when two molten plastics meet and flow together into the mold.
We are the professional manufacturer for the Pneumatic drilling rig, supply wide range of the Drilling Machine.
Pneumatic water well drilling rig is an efficient multi-functional drilling equipment, suitable for civil drilling , geothermal drilling,and drilling irrigation wells, ground source heating Pump wells and on, with a large diameter drilling,deep drilling, mobile and flexible application geographical advantages.The DTH drilling rig is especially for mountain and rock formation well projects,can be drill in different layers.The pneumatic well drilling rig can drill holes with air compressor in all formations, that makes the drilling speed is very fast when drilling the hard rock. More, the maximum hole diameters could up to 300mm. Depth could up to 500m.
HQZ200
Drilling diameter : 100-254mm
Drilling depth: 200m
Drilling direction: to the ground 45°- 90°
One time advance length of the drill: 1500mm
Electric motor power: 11kw
Drilling swing speed: 52rpm
Air pressure: 1.45-2.5Mpa
Air consumption: 15-27m*3/min
Total weight: 1600kg
FAQ:
Q: How about payment terms?
A: 30% TT deposit+70% TT before shipment ,50% TT deposit +50% LC balance, Flexible payment can be negotiated.
Q:Installation and commissioning?
A:We will send our engineer for installation and commissioning, but relevant cost will be paid by you.
Q: Do you have some videos where we can see the line producing?
A: Yes, we can provide some videos for reference.
Pneumatic Water Well Drilling Machine
Pneumatic Drilling Machine,Air Compressor Drilling Machine,Air Compressor Stone Drilling Machine,Pneumatic Water Well Drilling Machine
SHANDONG HENGWANG GROUP , http://www.hwmac.com