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: Drill 4.2 holes, tap 5 thread, choose what kind of drill sleeve: Look at your drill sleeve material is what, if it is rotating drill sleeve, the direct selection of about 0.02 larger than the drill can, if they do need a kind of drilling quenching, will put a bit into the hole position accuracy -- mainly depends on your workpiece hole

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 element (drill sleeve), why does your company not use drill sleeve in actual production?There may be several reasonsThe 1 bit and the products to be machined are fixed, and the drill bit has sufficient positioning for steel2 the shape tolerance of the hole to be drilled has no requirementThe 3 bit has a self - located cutting edgeReaming generally does not require additional positioning, the pre drilling itself plays a guiding role. In particular, there are positioning

Q: Can the drill jig designed in mechanical processing be without drill bush?: Less quantity can be without drill sleeveThe drill sleeve is used for drilling, hardening and tempering, and the hardness is improved

Q: How do you determine the size of the drill sleeve with a drill diameter of 6?. Thank you: The inner diameter of the general drill sleeve can be chosen by H9, but the deformation of the drill sleeve after the quenching has to be considered

Q: How should the drill bit of the 4mm bit be calculated?: Drilling sets play the role of drill guide and support, they should be coordinated with precision oriented, but also can not drill and drill sleeve between too much friction, usually with H7/g6 G7/h6

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: What kinds of drill sleeves are used? What are they used for?: Drill sleeve is divided into fixed drilling sleeve and fast change drill sleeve two kinds. A fixed drill sleeve is used for drilling only. Quick drill bushing, is generally the first to remove the drill sleeve on the drilling, reaming and reaming.

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?: Tolerable。 T06 or T08 can, but should not wear very fast quenching, the inner diameter of H8, H9, such as the outer diameter with H8/n7 this can often remove.

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