Roller Kelly Bushing

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Loading Port:: China Main Port

Payment Terms:: TT or LC

Min Order Qty:: 1 Piece pc

Supply Capability:: 35 Pieces per Month pc/month

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1.roller Kelly bushing

2.HDS HDP M4 S4

3.API Spec 7K ISO9001:2008

4.GB/T 28001-2001

5.GB/T 24001-2004-ISO14001:2004

Roller kelly bushings are used for 17 1/2-49 1/2 inch rotary tables. They are designed and manufactured according to API Spec 7K.

Type	Way of Drive	Model	Suitable for Kelly
Type	Way of Drive	Model	Square	Hex.
Heavy	Square Drive	HDS	21/2-6	3-6
	Pin. Drive	27-HDP	3-6	3-6
	Pin. Drive	20-HDP	3-6	3-6
Medium	Square Drive	MDS	21/2-41/4	3-41/4
	Square Drive	M4	21/2-51/4	3-41/4
	Pin. Drive	20-MDP	21/2-41/4	3-41/4
	Pin. Drive	17-MDP	21/2-41/4	3-41/4
Light-duty	Square Drive	S4	21/2-41/4	3-41/4

Q:How do you determine the size of the drill sleeve with a drill diameter of 6?. Thank you: The bore size of drill sleeve is determined according to F7 tolerance. That is: 6F7,6 deviation: +0.022. deviation +0.010.

Q:I wonder if it works Because of the large number of drilled holes, the wear of common steel is relatively large. But T10 steel needs quenching. I don't have any specialized equipment here. Usually it is heated by oxygen acetylene, and then it is quenched by oil. I wonder if T10 steel is good. What about the deformation? Outside diameter 15mm, inner hole 8.6MMIf not, what is the best way to do it? Or what to replace?: As the drill material set is the first choice of bearing steel GCr15, the quenching temperature is 835 ~ {850 cooling medium: oil, the tempering temperature is 150 ~ 170 hardness can reach 61 ~ 65}, GCr15 bearing steel with good hardenability, high abrasion resistance, high fatigue life. In general industry, this material is commonly used as drill sleeves. Carbon tool steel T10 drill can also set {the quenching temperature is 780 cooling medium: water or oil, the tempering temperature is 200 ~ 250 hardness of 60 ~ 64} in the use of performance is far better than GCr15 bearing steel. If there is no professional heat treatment equipment should pay attention to the quenching temperature and tempering temperature, especially the quenching temperature is 835 ~ 850 and I hope to help you.

Q:Specific depends on what number you are cone sets, you can compare:0 1:19.212 9.0451 1:20.047 12.0652 1:20.020 17.783 1:19.922 23.8254 1:19.254 31.2675 1:19.002 44.3996 1:19.180 63.348: Specific depends on what number you are cone sets, you can compare:0 1:19.212 9.0451 1:20.047 12.0652 1:20.020 17.783 1:19.922 23.8254 1:19.254 31.2675 1:19.002 44.3996 1:19.180 63.348

Q:Can the drill jig designed in mechanical processing be without drill bush?: May not。 The drill sleeve is the guide of the drill bit, reamer and reamer. The tool is of high hardness. If it is not drilled, it will lose its guiding effect very quickly. Drill sleeve materials such as T8A, T10A, is the high quality carbon steel, general file, ordinary drill, scraper, are made of it, high hardness after quenching, can reach HRC60.

Q:What kinds of drill sleeves are used? What are they used for?: Drill sleeve can be divided into four kinds, namely: fixed drilling sleeve, interchangeable drill sleeve, fast change drill sleeve, special drill sleeve.Fixed drill sleeve: drill sleeve is directly pressed on the drilling template. The fixing drill sleeve is simple in structure and high in drilling accuracy, but it can not be replaced after wearing. Fixed drill sleeves are suitable for small batch production in a single drilling process.Replaceable drill sleeve: drill is sheathed in the Bush, bushing is pressed on the drilling template, and the drill sleeve is pressed by screw to prevent the drill bush from rotating or withdrawing. When the drill sleeve is worn, loosen the screws and replace them quickly. A single drilling procedure suitable for mass production.Quick change drill sleeve: its structure is similar to interchangeable drill sleeve. When the workpiece in one process has the same hole to be processed by various methods (such as drilling, reaming, reaming, tapping, etc.), the drill sleeve with different apertures can be quickly replaced. When replacing, the drill sleeve gap is turned to the screw and can be taken out.Special drill sleeve: when the structure of the workpiece is not suitable for the use of standard drill sleeve, it can design a special drill sleeve adapted to the workpiece. The height of the drill sleeve is increased by H, the guiding performance is good, the tool rigidity is improved, and the machining accuracy is high, but the abrasion of the drill sleeve and the cutter is intensified, and the H= (1 to 2.5) d is generally taken. The chip space H increases and the chip removal is convenient, but the tool rigidity and the machining accuracy of the hole will be reduced. Cast iron for drilling easier to remove chips, h= (0.3 ~ 0.7) d; drilling difficult to chip out of the steel parts, h= (0.7 ~ 1.5) d.

Q:I have seen many drilling techniques in practice, and I find that drilling jigs do not have guiding elements (i.e. drill sleeves). Why do not they use drill sleeves in actual production? And I have seen in many books drilling jig, need drill sleeve of the statement, how is this matter?Reaming in our company is also done by drilling machines. Change the drill bit to the reamer. Do you want reaming?I asked the master of the workshop why the drilling fixture does not need to drill, they do not even know what the drill sleeve is, as if they are in the design of drilling machine clamp, there is no drill sleeve concept.I really don't understand why the drilling jig is using drill sleeves If it is for the tool, you can put on a processed product, and then the tool is ok. Why?: In the actual drilling process, the drilling machine fixture should have guiding elements (drill sleeve).The role of drill sleeve is mainly used to determine the location of the drill bit, reamer, reamer and other fixed size tools, and the structure and size of the drill bush have been standardized. According to the characteristics of the use, the drilling sleeve has four types of fixed drilling sleeve, replaceable drill sleeve, fast change drill sleeve and special drilling sleeve. Moreover, the drill sleeve is inserted into the drilling template by "interference fit".The significance of drill sleeves is that they can locate and guide the machining of the cutting tools so as to improve the machining accuracy.

Q:Drill 4.2 holes, tap 5 thread, choose what kind of drill sleeve: Tapping 5 of the thread, drilling 4.2 of the hole, you need to drill sleeve, indicating that the screw hole distance, position tolerances, usually is + 0.1.In general, the tolerance of the drill hole to the choice of F7 is 4.2F7, that is, Phi 4.2 (+0.022 / +0.01).Drill sleeve material, you can choose T8, T10, etc., more than HRC60 quenching.Drill sleeve form can be chosen by oneself (fixed drilling sleeve, quick change drill sleeve, etc.).

Q:How should the drill bit of the 4mm bit be calculated?: Mm to 4 mm, the drill is a straight shank, and the drill chuck is equipped with it. Drills that can be fitted with drill sleeves are all taper shank unless nonstandard.As for the drill sleeve is divided into 0# to 6 # Morse MorseAh ~ problem layman, too lazy to answer

Equipped with excellent equipment, strong technique force and completed test facilities, the company is a first-level supply member of Chinese Petroleum and Natural Gas Consortium, as well as the member of China Petrochemical Material Resources Market. We have obtained the Production License issued by the nation.we believe that our company will usher in a new takeoff in the near future.

1. Manufacturer Overview
Location	Jiangsu,China
Year Established	2000
Annual Output Value
Main Markets	North America South America Mid East Central America
Company Certifications	ISO 9001:2008;ISO 14001:2004

2. Manufacturer Certificates
a) Certification Name
Range
Reference
Validity Period

3. Manufacturer Capability
a)Trade Capacity
Nearest Port
Export Percentage
No.of Employees in Trade Department
Language Spoken:	English, Chinese
b)Factory Information
Factory Size:	10,000-30,000 square meters
No. of Production Lines	4
Contract Manufacturing	OEM Service Offered Design Service Offered Buyer Label Offered
Product Price Range	Low and/or Average