Question 1

What is the 3H-2/3H-2A Series power chuck?

Accepted Answer

The 3H-2/3H-2A Series is a 3-jaw extra large thru-hole power chuck featuring a Wedge-Hook type mechanism. It is designed as a Kitagawa-style replacement chuck, offering a significantly larger through-hole than standard chucks while maintaining compatibility with most CNC lathe spindles.

Question 2

What are the key features of this chuck series?

Accepted Answer

Key features include: Extra large thru-hole for uninterrupted bar feeding; Hardened and ground matching surfaces for extended service life; High rigidity and repeatability for stable clamping precision; Customizable J and K values tailored to your machine.

Question 3

Where can I find the detailed dimensions and specifications?

Accepted Answer

The complete dimensions and specifications for both 3H-2A and 3H-BA series are compiled in the orange data sheet. This data sheet includes mounting interface dimensions, plunger stroke, jaw stroke, maximum draw-bar pull, maximum clamping force, maximum RPM, and weight. Please contact us to request a copy.

Question 4

What sizes are available?

Accepted Answer

The 3H-2/3H-2A Series is available in various sizes ranging from 4 inches to 24 inches. For specific size availability and detailed specifications, please refer to the orange data sheet or contact our sales team.

Question 5

What do 'J' and 'K' values mean in the specifications?

Accepted Answer

J = The hole diameter of the blank draw nut (the internal bore that the drawbar passes through). K = The maximum thread specification for the drawbar connection. If not notified otherwise, Autogrip will adopt the default K value. Both J and K values can be customized to match your machine's drawbar specifications.

Question 6

Is this chuck compatible with my existing machine?

Accepted Answer

The 3H-2/3H-2A Series is designed as a Kitagawa-style replacement chuck and is compatible with most standard CNC lathe spindles. However, you should verify your spindle nose mounting type (e.g., A2-5, A2-6, A2-8) and your machine's maximum speed rating before ordering.

Question 7

What rotary cylinder should I use with this chuck?

Accepted Answer

For power chucks in the 4 to 10 size range, standard industrial rotary hydraulic cylinders (commonly used in the industry) are recommended. If you are using a larger chuck size or have non-standard bore requirements, please consult us for proper cylinder matching and drawbar stroke recommendations.

Question 8

Does the chuck come with a built-in cylinder?

Accepted Answer

No. The 3H-2/3H-2A is a power chuck that requires an external rotary hydraulic cylinder and drawbar for actuation. The cylinder must be selected and matched to the chuck's specifications.

Question 9

Can the chuck be customized for my specific needs?

Accepted Answer

Yes. We offer extensive customization options: J value (draw nut bore diameter), K value (maximum thread specification), installation interface (different spindle mounting interfaces), and special-purpose machines with comprehensive ODM services. If you need a different bore size or installation interface, please contact us.

Question 10

What ODM services do you offer?

Accepted Answer

We provide comprehensive ODM services for customized chucks designed for special-purpose machines, tailored for maximum efficiency and precision. Simply provide your workpiece specifications, spindle type, and required clamping force, and our engineering team will propose a tailored solution with detailed drawings for your approval.

Question 11

What machining operations is this chuck suitable for?

Accepted Answer

The 3H-2/3H-2A Series is suitable for: Turning centers (ensuring optimal performance and reliability in both small-batch and large-scale production); Machining centers (enhancing performance and ensuring consistent quality and productivity); Special-purpose machines (customized solutions for maximum efficiency and precision).

Question 12

How is the chuck constructed for durability?

Accepted Answer

All matching surfaces of components are hardened, precision-ground, and directly lubricated. This ensures: High rigidity and high repeatability precision; Extended service life; Reduced wear over millions of clamping cycles.

Question 13

What maintenance is required?

Accepted Answer

Regular maintenance should include lubrication of all grease points, cleaning of swarf and debris from the chuck body and jaw slideways, and periodic inspection for wear on wedge bars, master jaws, and jaw serrations. Always observe the maximum rated speed for your chuck size.

Question 14

How do I order the correct chuck for my machine?

Accepted Answer

When placing an order, please provide: Required chuck size (e.g., 8, 10, 12); Spindle nose mounting type (e.g., A2-5, A2-6, A2-8); Required J value (draw nut bore diameter); Required K value (thread specification); Maximum workpiece diameter and bar size; Your machine's maximum speed and drawbar stroke.

Question 15

Where can I get technical support?

Accepted Answer

Technical support is available for chuck selection and sizing, installation guidance, cylinder matching, maintenance and troubleshooting, and customization inquiries. Please contact our technical support team with your specific questions.

Product profile

Certification

Application

Jaw Type

Model NO.

Power

Structure

Material

Type

Chucking Dia. Max. (mm)

Chucking Dia. Min. (mm)

Max. Speed Min-1 (r.p.m.)

Max Clamping Force (kN)

Thru-Hole (mm)

Jaw Stroke (Dia.) (mm)

Plunger Stroke (mm)

Max. D.B. Pull kN (Kgf)

Weight (Kg)

Transport Package

Specification

Trademark

Origin

Key features

Company profile

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