Percussion drilling is employed when auger or wash boring is not possible in very stiff soil or rock. It also can be used in most soil types.
Here the advancement of a hole is achieved by alternatively lifting and dropping a heavy cutting or hammering bit that is attached to a rope or cable that is lowered into an open hole or inside a temporary casing (casings are hollow cylindrical pipes used for borehole stability and to prevent the loss of drilling fluid through the boreholes).
Usually a tripod is used to support the cable. The stroke of bit varies according to the ground condition. The major disadvantage of this method is that it is not possible to get good-quality undisturbed samples. In very hard rock (and especially fractured hard rock), down-the-hole (DTH) drilling can be employed. In this case the hammer, applying repeated percussive pressure, is located just behind the drill bit inside the hole, unlike the open percussion drilling, where the hammer is on top of the drilling string.
The drilling string provides the necessary force and rotation to the hammer and bit, as well as compressed air or fluids to the hammer and for the flushing of cuttings.
This arrangement also allows for much deeper percussion drilling. However, the DTH drills are typically more expensive.
Percussion Drilling Rig,Cable Percussion Drilling,Percussion Drilling Equipment,Deep Foundation Engineering Percussion Rig Henan YK Prospecting Machinery Co., Ltd , https://www.yydthdrillingrig.com
Specifications
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                            Combine Harvester Blade
Material
65Mn
Hardness
HRC 50-58
Thickness
2.8mm-3.0mm,2.1mm-2.5mm,etc
Teeth
Pressing or milling Teeth
Surface Treatment
oil painting, rust quenching, varnish stoving, powder coated,induction hardening.
Color
Black, Red, Silver, White, Natural color, according to the requirement.
Function/Use
Widely used for John Deere, New Holland, Class, Case, Lovol, Kubota and Yanmar machinery.
Feature/Characteristic
Longest using life, the lowest price and the best service.
Advantages
Highest wear life due to special edge making process; Maximal safety due to rigorous quality checks and test.
Certificate
ZJQC and ISO9001, Alibaba Trading Assessment
Place of Origin
Shandong, China (Mainland)
Package
Cartons and Pallets for free fumigation or steel tray if there are no special requirements. or according to your requests to pack.
Packing and Shipping
Neutral Cartons and Pallets for free fumigation or steel tray if there are no special requirements. or according to your requests to pack.
Our Factory
Chengyu Trailer belongs to Chengyu Group which is one of the biggest manufacturers for all kinds of trucks, especially for the semi trailers and parts in shandong. We specialized in many kinds of trailers, special vehicle and various truck parts, such as tank trailer, flatbed semi trailer, skeleton semi trailer, low bed semi trailer, dumping semi trailer, oil tanker semi trailer, bulk cement semi trailer and so on.  "Chengyu" brand axle, air Suspension, landing gear and other parts are also popular used by all over the world customers. Also we can customized production for our customers.
The photos of the Production process for Kubota combine Harvester Knife Guard/Combine Harvester Finger
FAQ
Q1. What is your terms of packing?
A: Generally, we pack our goods in whilt boxes and then carton, wooden box. If you have legally registered patent,Â
we can pack the goods in your branded packages after getting your authorization letters.
Q2. What is your terms of payment?
A: T/T 30% as deposit, and 70% before delivery. We'll show you the photos of the products and packagesÂ
before you pay the balance.
Q3. What is your terms of delivery?
A: EXW, FOB, CFR, CIF.
Q4. How about your delivery time?
A: Generally, it will take 30 to 60 days after receiving your advance payment. The specific delivery time dependsÂ
on the items and the quantity of your order.
Q5. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.
Q6. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost andÂ
the courier cost.
Q7. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery
Q8: How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them,Â
no matter where they come from.
Other products
Contact me
Â
Â
Â
Â
Kubota combine Harvester Knife Guard/Combine Harvester Finger
Specifications
Â
                            Combine Harvester Blade
Material
65Mn
Hardness
HRC 50-58
Thickness
2.8mm-3.0mm,2.1mm-2.5mm,etc
Teeth
Pressing or milling Teeth
Surface Treatment
oil painting, rust quenching, varnish stoving, powder coated,induction hardening.
Color
Black, Red, Silver, White, Natural color, according to the requirement.
Function/Use
Widely used for John Deere, New Holland, Class, Case, Lovol, Kubota and Yanmar machinery.
Feature/Characteristic
Longest using life, the lowest price and the best service.
Advantages
Highest wear life due to special edge making process; Maximal safety due to rigorous quality checks and test.
Certificate
ZJQC and ISO9001, Alibaba Trading Assessment
Place of Origin
Shandong, China (Mainland)
Package
Cartons and Pallets for free fumigation or steel tray if there are no special requirements. or according to your requests to pack.
Packing and Shipping
Neutral Cartons and Pallets for free fumigation or steel tray if there are no special requirements. or according to your requests to pack.
Our Factory
Chengyu Trailer belongs to Chengyu Group which is one of the biggest manufacturers for all kinds of trucks, especially for the semi trailers and parts in shandong. We specialized in many kinds of trailers, special vehicle and various truck parts, such as tank trailer, flatbed semi trailer, skeleton semi trailer, low bed semi trailer, dumping semi trailer, oil tanker semi trailer, bulk cement semi trailer and so on.  "Chengyu" brand axle, air Suspension, landing gear and other parts are also popular used by all over the world customers. Also we can customized production for our customers.
The photos of the Production process for Kubota combine Harvester Knife Guard/Combine Harvester Finger
FAQ
Q1. What is your terms of packing?
A: Generally, we pack our goods in whilt boxes and then carton, wooden box. If you have legally registered patent,Â
we can pack the goods in your branded packages after getting your authorization letters.
Q2. What is your terms of payment?
A: T/T 30% as deposit, and 70% before delivery. We'll show you the photos of the products and packagesÂ
before you pay the balance.
Q3. What is your terms of delivery?
A: EXW, FOB, CFR, CIF.
Q4. How about your delivery time?
A: Generally, it will take 30 to 60 days after receiving your advance payment. The specific delivery time dependsÂ
on the items and the quantity of your order.
Q5. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.
Q6. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost andÂ
the courier cost.
Q7. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery
Q8: How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them,Â
no matter where they come from.
Other products
Contact me
Â
Â
Â
Â
Kubota Combine Harvester Knife Guard/Combine Harvester Finger
Trademark: Chengyu
Origin: China
Trademark: Chengyu
Origin: China
Kubota combine Harvester Knife Guard/Combine Harvester Finger