ODM Retention Knob JIS B6339 Supplier, Factories

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ODM Retention Knob JIS B6339 Supplier, Factories

JIS retention knob, alternatively known as a pull stud, is designed for CNC machining centers adhering to Japanese industrial standards. It servesÂ to secure the tool holder ontoÂ the spindle and must endure high-intensity cutting forces.

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Product Description

Description

Material of retention knob is usually alloy steel such as 40Cr, 45# steel etc. JIS retention knob is a connecting component between machining centers and cutting tools, directly responsible for fixing the tools and withstanding high-intensity cutting forces. Their quality is related to machining accuracy and stability. Improper use can cause damage to the spindle or scrapping of the workpiece.

It is usually made of high-quality steel such as 20CrMnTi, and undergoes carburizing and quenching treatment. The surface is hard and wear-resistant, while the interior is tough. It has good fatigue resistance and can remain stable during high-speed processing.

According to the JIS B6339 standard, there is only one type of retention knob. The slope Angle of the retention knob is 15 degrees and it is used in tensioning devices without steel balls, with the code "xxP".

Features

1. High Precision and Dimensional Stability The dimensional accuracy and positional tolerance requirements are strict to ensure the precise fit with the tool holder and the spindle.

2. Mechanical Property Equilibrium After targeted heat treatment, it possesses appropriate hardness and toughness, capable of withstanding tensile and impact forces during processing.

3. Reliable Consistency In accordance with JIS standards, performance fluctuations across batches are minimized, ensuring interchangeability and easy maintenance.

Parameter

Model No.	D	D1	D2	M	L	L1	L2	H	H1
LDJ-30P	12.5	8	12	M12	43	23.4	18.4	5	3
LDJ-35P	12.5	11	15	M12	44	24	19	5	3
LDJ-40P	17	14	19	M16	54	29	23	7	3
LDJ-45P	21	17	23	M20	60	30	23	7	4
LDJ-50P	25	21	28	M24	74	34	25	7	5
LDJ-55P	31	27	36	M30	98	48	36	11	7

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Service

We have been providing the following CNC tools services to global customers for decades:

Business Type: OEM & ODM Manufacturer
Drawing Formats: DWG, PDF, IGS, STEP, SLDPRT, DXF, X_T, etc.
Customization: Available upon reaching minimum order quantities.
Quality System: ISO9001: 2008 certified management.
Core Advantages: Reliable quality, competitive pricing, high precision with tight tolerances, and excellent after-sales support.

Frequently Asked Questions

What materials are used for JIS retention knobs?

They are typically manufactured from high-quality alloy steel such as 20CrMnTi, 40Cr, or 45# steel, ensuring durability and strength.

What is the standard angle for JIS B6339 retention knobs?

According to the JIS B6339 standard, these retention knobs feature a 15-degree slope angle designed for specific tensioning devices.

How is the hardness of the product ensured?

The knobs undergo carburizing and quenching heat treatments to achieve a hard, wear-resistant surface while maintaining a tough interior for fatigue resistance.

Do you support custom manufacturing?

Yes, we provide OEM and ODM services. Customization is available once a certain production quantity is reached.

What quality standards do your products follow?

Our production and QC systems are certified under ISO9001:2008, ensuring consistent high precision and reliability.

Which file formats are accepted for technical drawings?

We accept a wide range of formats including DWG, PDF, IGS, STEP, SLDPRT, SLDDRW, PRT, DXF, and X_T.