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The XIONGYI 3H-12 hydraulic power chuck is designed for CNC turning applications that require high clamping force, reliable workholding and a large through-hole. With its 12-inch chuck size and 3-jaw configuration, the 3H-12 provides a practical workholding solution for a wide range of industrial machining operations.
One of the key advantages of the 3H-12 is its 91 mm large through-hole. The open-center design allows bar stock, shafts and long workpieces to pass through the chuck, making it particularly suitable for CNC turning applications involving longer materials.
The large bore can help manufacturers reduce unnecessary material handling and improve machining efficiency when processing bar-fed or shaft-type components.
The 3H-12 provides a maximum clamping force of 143.7 kN, helping maintain stable workpiece positioning during turning operations.
High and consistent clamping force is particularly important when machining larger or heavier workpieces and during operations involving higher cutting loads.
The 3-jaw wedge-hook design provides automatic and balanced workholding around the workpiece. The chuck is engineered for rigid clamping and dependable positioning, making it suitable for continuous CNC production.
Hardened and ground mating surfaces help improve wear resistance and maintain reliable operating accuracy over extended use.
With a maximum speed of 3,300 rpm, the 3H-12 is suitable for a wide range of CNC turning and machining applications where productivity and reliable workholding are important.
Its combination of speed, clamping force and rigid construction makes it suitable for both general machining and demanding production environments.
The 3H-12 has a maximum chucking diameter of 304 mm and a minimum chucking diameter of 34 mm, allowing it to accommodate a broad range of workpiece sizes.
This makes the chuck suitable for manufacturers machining different components on CNC lathes without requiring multiple chuck sizes for every application.
Specification | Value |
|---|---|
Model | 3H-12 |
Chuck Type | 3-Jaw Hydraulic Power Chuck |
Chuck Size | 12 inch |
Mounting | A8 |
Through-Hole | 91 mm |
Maximum Chucking Diameter | 304 mm |
Minimum Chucking Diameter | 34 mm |
Plunger Stroke | 25 mm |
Jaw Stroke | 10.6 mm |
Maximum Pull Force | 54.9 kN |
Maximum Clamping Force | 143.7 kN |
Maximum Speed | 3,300 rpm |
Moment of Inertia | 0.77 kg·m² |
Weight | Approx. 56.6–59.3 kg |
Maximum Operating Pressure | 2.5 MPa |
Model | Spindle | Thru-hole (mm) | Plunger stroke (mm) | Jaw stroke (Dia.) (mm) | Chucking Dia. Max. (mm) | Chucking Dia. Min. (mm) | Max. D.B. pull kN (kgf) | Max. clamping force kN (kgf) | Max. speed min⁻¹ (r.p.m.) | I kg‧m² | Weight (kg) | Weight (kg) | Matching cyl. | Max. pressure MPa (kgf/cm²) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
3H-12 | A8 | 91 | 25 | 10.6 | 304 | 34 | 54.9 (5600) | 143.7 (14650) | 3300 | 0.77 | 56.6 | 59.3 | TK-A1291 | 2.5 (25) |
3H-15 | A8 | 120 | 25 | 10.6 | 381 | 50 | 71 (7250) | 179.8 (18350) | 2500 | 2.28 | 120 | 134 | TK-A1512 | 2.3 (23) |
3H-15 | A11 | 120 | 25 | 10.6 | 381 | 50 | 71 (7250) | 179.8 (18350) | 2500 | 2.28 | 120 | 127 | TK-A1512 | 2.3 (23) |
3H-18 | A11 | 120 | 25 | 10.6 | 450 | 50 | 71 (7250) | 180.3 (18400) | 2500 | 4.46 | 120 | 127 | TK-A1512 | 2.3 (23) |
Technical specifications should be confirmed with XIONGYI before final selection, as configurations may vary depending on the chuck and machine setup.
Model | Spindle | A | B | B | C | D | D1 | D2 | E | E1 | F | G max. | G max. | G min. | G min. | H | J | K max. | K Default | L | L1 | L1 | M | N | P | Q max. | Q min. | R max. | R min. | S | T | U |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
3H-12 | A8 | 304 | 110 | 122 | 220 | 190 | 139.72 | 190 | 6 | 18 | 91 | 10 | 28 | -15 | 9 | 28 | 50 | M100x2 | M100x2 | 6~M16 | 23 | 25 | 51.3 | 130 | 30 | 46.25 | 11.75 | 61.3 | 56 | 50 | 21 | 3~M8 |
3H-15 | A8 | 381 | 132 | 159 | 300 | 235 | 139.72 | 171.4 | 6 | 33 | 120 | 11 | 44 | -14 | 19 | 39 | 60 | M130x2 | M115x2 | M130x2 | M100x2 | 6~M20 | 30 | 24 | 63 | 49.75 | 19.75 | 77.5 | 72.2 | 62 | 25.5 or 22 | 6~M16 |
3H-15 | A11 | 381 | 132 | 148 | 300 | 235 | 196.87 | 260 | 6 | 22 | 120 | 11 | 33 | -14 | 8 | 39 | 60 | M130x2 | M130x2 | 6~M20 | 30 | 28 | 63 | 165 | 43 | 49.75 | 19.75 | 77.5 | 72.2 | 62 | 25.5 or 22 | 3~M10 |
3H-18 | A11 | 450 | 132 | 148 | 300 | 235 | 196.87 | 260 | 6 | 22 | 120 | 11 | 33 | -14 | 8 | 39 | 60 | M130x2 | M130x2 | 6~M20 | 31 | 29 | 63 | 165 | 43 | 82.75 | 21.25 | 77.5 | 72.2 | 62 | 25.5 or 22 | 3~M10 |
注：尺寸表中有重复列名（如 B、G、L1 等），系原厂设计，请以实际参数位置为准。
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<tr>3H-12 3-Jaw Hydraulic Power Chuck 2D PDF
The 3H-12 large thru-hole hydraulic power chuck can be used for a variety of CNC machining applications, including:
CNC lathes
CNC turning centers
Automatic turning machines
Bar stock machining
Shaft machining
Heavy-duty turning
High-volume production
Automated machining lines
General metalworking
Precision component manufacturing
It is particularly suitable for applications where a combination of large workpiece capacity, high clamping force and through-hole access is required.
The 3H-12 offers several advantages for CNC machining manufacturers:
12-inch chuck size for larger workpieces
3-jaw hydraulic design for automatic workholding
91 mm large through-hole for bar and shaft machining
304 mm maximum chucking diameter
143.7 kN maximum clamping force
3,300 rpm maximum speed
Rigid wedge-hook construction
Hardened and ground mating surfaces
Suitable for CNC lathes and turning centers
Designed for continuous industrial machining
Suitable for automated production environments
Looking for a reliable 12-inch hydraulic power chuck for a CNC lathe?
The XIONGYI 3H-12 3-jaw large thru-hole power chuck provides high clamping force, large workpiece capacity and reliable hydraulic workholding for demanding CNC turning applications.
Contact XIONGYI to discuss your CNC power chuck requirements, machine compatibility, mounting configuration and application needs.
Frequently Asked Questions
The 3H-12 is a 12-inch 3-jaw hydraulic power chuck with a large 91 mm through-hole, designed primarily for CNC lathes and CNC turning centers.
The 3H-12 has a 91 mm through-hole, allowing bar stock, shafts and other long workpieces to pass through the center of the chuck.
The maximum chucking diameter is 304 mm, while the minimum chucking diameter is 34 mm.
The 3H-12 provides a maximum clamping force of 143.7 kN, providing stable workholding for CNC turning operations.
The maximum rated speed of the 3H-12 is 3,300 rpm.
The 3H-12 is designed for applications including CNC lathes, CNC turning centers, automatic turning machines and automated machining systems. Machine compatibility should be checked based on spindle mounting, hydraulic cylinder configuration and other machine specifications.
A large thru-hole allows bar stock and long workpieces to pass through the center of the chuck. This can improve material utilization and machining flexibility, particularly when manufacturing shafts and other long components.
The correct power chuck should be selected based on factors such as chuck size, maximum workpiece diameter, through-hole size, spindle mounting, clamping force, operating speed, hydraulic cylinder compatibility and the specific machining application. Contact XIONGYI for assistance with chuck selection.
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