Hollow and solid rotary hydraulic cylinders for CNC lathe hydraulic chuck actuation.
Rotary Hydraulic Cylinder
KORRETTO rotary hydraulic cylinders drive hydraulic chuck clamping and release through the drawbar on CNC lathes. This page covers both hollow rotary hydraulic cylinders and solid rotary hydraulic cylinders. Hollow cylinders are used when bar stock or tube stock must pass through the spindle, while solid cylinders are used when through-spindle feeding is not required.
Product Overview
A rotary hydraulic cylinder is the actuator that provides the thrust and stroke needed to clamp and release a hydraulic chuck. It must be selected together with the chuck, drawbar, spindle nose and hydraulic system.
This page is a combined page for hollow and solid rotary hydraulic cylinders. The two types must be displayed in separate sections so users can clearly see which drawing and parameter table belong to which cylinder type.
Product Types
| Type | Description | Typical use |
|---|---|---|
| Hollow Rotary Hydraulic Cylinder | Rotary cylinder with through-hole structure. | Bar stock, tube stock and machines requiring through-spindle material passage. |
| Solid Rotary Hydraulic Cylinder | Rotary cylinder without through-hole passage. | Short workpieces, individual blanks and solid chuck systems. |
Technical Data and Dimensions
The hollow and solid rotary hydraulic cylinders are shown in separate groups so the drawings and parameter tables can be matched to the correct structure.
Hollow Rotary Hydraulic Cylinder
Hollow rotary hydraulic cylinder for through-spindle bar or tube work.
Use this drawing to confirm the hollow cylinder dimensions and drawbar connection.
| Model | A (Piston Diameter) | B | D1 | D2 | E(H7) | F1 | F2(H8) | G1 max | G1 min | G2 max | G2 min | H | J | K | L1 | L2 | M1 | M2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KY-428T | 90 | 124 | 100 | 108 | 80 | 40 | 30 | 10 | 0 | 35 | 25 | 61 | 94.5 | 139 | 25 | 13 | M33*1.5 | 6-M8*65 |
| KY-532T | 105 | 141 | 115 | 125 | 100 | 48 | 35 | 15 | 0 | 40 | 25 | 70 | 107.5 | 148 | 25 | 13 | M38*1.5 | 6-M8*75 |
| KY-536T | 105 | 141 | 115 | 125 | 100 | 48 | 38 | 15 | 0 | 40 | 25 | 70 | 107.5 | 148 | 25 | 13 | M42*1.5 | 6-M8*75 |
| KY-642T | 125 | 156 | 130 | 140 | 100 | 65 | 45 | 15 | 0 | 40 | 25 | 76 | 107.5 | 148 | 30 | 16 | M50*2 | 6-M8*75 |
| KY-646T | 125 | 156 | 130 | 140 | 100 | 65 | 50 | 15 | 0 | 40 | 25 | 76 | 107.5 | 148 | 30 | 16 | M55*2 | 6-M8*75 |
| KY-846T | 145 | 185 | 170 | 165 | 130 | 70 | 50 | 20 | 0 | 45 | 25 | 72 | 150 | 30 | 16 | M55*2 | 6-M10*100 | |
| KY-852T | 145 | 185 | 170 | 165 | 130 | 70 | 55 | 20 | 0 | 45 | 25 | 72 | 150 | 30 | 16 | M60*2 | 6-M10*100 | |
| KY-1068T | 175 | 215 | 190 | 190 | 160 | 95 | 70 | 25 | 0 | 50 | 25 | 94 | 136 | 188 | 35 | 16 | M75*2 | 6-M10*100 |
| KY-1075T | 175 | 215 | 190 | 190 | 160 | 95 | 80 | 25 | 0 | 50 | 25 | 94 | 136 | 188 | 35 | 16 | M85*2 | 6-M10*100 |
| KY-1287T | 205 | 240 | 215 | 220 | 180 | 110 | 90 | 30 | 0 | 55 | 30 | 100 | 145 | 205 | 35 | 16 | M95*2 | 6-M10*105 |
| KY-1291T | 205 | 240 | 215 | 220 | 180 | 110 | 95 | 30 | 0 | 55 | 30 | 100 | 145 | 205 | 35 | 16 | M100*2 | 6-M10*105 |
| KY-1512T | 250 | 305 | 275 | 280 | 230 | 140 | 115 | 30 | 0 | 55 | 30 | 113 | 156 | 245 | 35 | 16 | M120*2 | 6-M12*120 |
| Model | Push-Side Piston Area (cm²) | Pull-Side Piston Area (cm²) | Piston Stroke (mm) | Max. Speed (r/min) | Max. Pressure MPa (kgf/cm²) | Max. Push-Side Force kN (kgf) | Max. Pull-Side Force kN (kgf) | Moment of Inertia (kg·m²) | Weight (kg) | Total Leakage L/min |
|---|---|---|---|---|---|---|---|---|---|---|
| KY-428T | 51.9 | 51 | 10 | 7000 | 40(4.0) | 1868(18.3) | 1836(18) | 0.1 | 5.8 | 2.6 |
| KY-532T | 70.8 | 68.5 | 15 | 6000 | 40(4.0) | 2548(25) | 2466(24.2) | 0.012 | 6.1 | 3 |
| KY-536T | 70.8 | 68.5 | 15 | 6000 | 40(4.0) | 2548(25) | 2466(24.2) | 0.012 | 6.1 | 3 |
| KY-642T | 99.1 | 88 | 15 | 6000 | 40(4.0) | 3567(35) | 3168(31) | 0.018 | 6.1 | 3 |
| KY-646T | 99.1 | 88 | 15 | 6000 | 40(4.0) | 3567(35) | 3168(31) | 0.018 | 6.1 | 3 |
| KY-846T | 135.3 | 125 | 20 | 5500 | 40(4.0) | 4870(47.7) | 4500(44.1) | 0.035 | 11.8 | 3.9 |
| KY-852T | 135.3 | 125 | 20 | 5500 | 40(4.0) | 4870(47.7) | 4500(44.1) | 0.035 | 11.8 | 3.9 |
| KY-1068T | 182.7 | 169.5 | 25 | 4500 | 40(4.0) | 6577(64.5) | 6102(59.8) | 0.08 | 17.8 | 4.2 |
| KY-1075T | 182.7 | 169.5 | 25 | 4500 | 40(4.0) | 6577(64.5) | 6102(59.8) | 0.08 | 17 | 4.2 |
| KY-1287T | 249.3 | 232.8 | 30 | 3800 | 40(4.0) | 8975(87.9) | 8380(82.1) | 0.11 | 26.5 | 4.5 |
| KY-1291T | 249.3 | 232.8 | 30 | 3800 | 40(4.0) | 8975(87.9) | 8380(82.1) | 0.11 | 24.8 | 4.5 |
| KY-1511T | 356.5 | 335.3 | 30 | 3000 | 40(4.0) | 12830(125.7) | 12070(118.3) | 0.38 | 56.6 | 7.0 |
| KY-1512T | 356.5 | 335.3 | 30 | 3000 | 40(4.0) | 12830(125.7) | 12070(118.3) | 0.38 | 49.5 | 7.0 |
Solid Rotary Hydraulic Cylinder
Solid rotary hydraulic cylinder for non-through-spindle clamping systems.
Use this drawing to confirm the solid cylinder dimensions and mounting details.
| Model | A | B | D1 | D2 | E(H7) | F1 | F2(H8) | G max | G min | H | M1 | M2 | M3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SY-75H | 75 | 107 | 90 | 90 | 65 | 28 | 21 | 45 | 30 | 60 | M20*35 | M8*60 | 6-M8*16 |
| SY-100H | 100 | 135 | 115 | 100 | 80 | 28 | 21 | 45 | 25 | 77 | M20*35 | M8*75 | 6-M10*20 |
| SY-125H | 125 | 160 | 140 | 130 | 110 | 35 | 25 | 50 | 25 | 85 | M24*40 | M8*85 | 6-M12*20 |
| SY-150H | 150 | 190 | 170 | 130 | 110 | 45 | 31 | 55 | 25 | 98 | M30*45 | M10*100 | 12-M12*24 |
| SY-200H | 200 | 245 | 220 | 145 | 120 | 55 | 37 | 70 | 35 | 118 | M36*60 | M10*125 | 12-M16*30 |
| SY-250H | 250 | 296 | 275 | 200 | 160 | 60 | 37 | 100 | 40 | 156 | M36*60 | M12*160 | 12-M20*30 |
| Model | Push-Side Piston Area (cm²) | Pull-Side Piston Area (cm²) | Piston Stroke (mm) | Max. Speed (r/min) | Max. Pressure MPa (kgf/cm²) | Max. Push-Side Force kN (kgf) | Max. Pull-Side Force kN (kgf) | Moment of Inertia (kg·m²) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|
| SY-75H | 41.7 | 37 | 15 | 6000 | 40(4.0) | 1500(14.7) | 1330(13) | 0.02 | 3.2 |
| SY-100H | 75.4 | 70.8 | 20 | 5000 | 40(4.0) | 2710(26.6) | 2550(25) | 0.04 | 4.8 |
| SY-125H | 119.6 | 111.5 | 25 | 5000 | 40(4.0) | 4300(42.1) | 4010(39.3) | 0.06 | 7.2 |
| SY-150H | 173.6 | 159.2 | 30 | 5000 | 40(4.0) | 6250(61.2) | 5730(56.2) | 0.1 | 9.8 |
| SY-200H | 314.1 | 290.4 | 35 | 4000 | 40(4.0) | 11300(110.8) | 10454(102.4) | 0.25 | 15.7 |
| SY-250H | 485.7 | 462.3 | 60 | 2000 | 40(4.0) | 17500(171.5) | 16640(163.0) | 0.52 | 45.5 |
Selection Notes
- Choose hollow type when through-spindle passage is required.
- Choose solid type when the workpiece is short and through-spindle feeding is not needed.
- Match cylinder thrust and stroke with the chuck.
- Confirm drawbar thread, drawbar length and mounting dimensions.
- Check maximum speed, pressure range and hydraulic system compatibility.
- Review safety interlock and pressure stability for automated clamping.
Related Hydraulic Chuck Pages
FAQ
What is a rotary hydraulic cylinder used for?
It is used to provide the thrust and stroke needed to clamp and release a hydraulic chuck through the drawbar while the spindle rotates.
Is it a chuck or a chuck actuator?
It is a hydraulic chuck actuator, not the chuck body itself. The rotary hydraulic cylinder works together with the chuck, drawbar and spindle system.
How should a rotary hydraulic cylinder be matched with a hydraulic chuck?
The cylinder should be matched to the chuck by checking stroke, thrust, drawbar connection, mounting dimensions, speed and hydraulic pressure.
What is the difference between hollow and solid rotary hydraulic cylinders?
A hollow cylinder has a through-hole for bar or tube passage. A solid cylinder is used when through-spindle feeding is not required.
What pressure, stroke and pull / push force should be checked?
Check the hydraulic pressure range, piston stroke, push-side force and pull-side force together with the chuck clamping requirement and drawbar movement.
What spindle or drawbar information is needed?
Provide the spindle nose, spindle through-hole, drawbar thread, drawbar length and the connection details between the cylinder and the chuck.
What should be checked before installation?
Check mounting dimensions, hydraulic pressure, target speed, drawbar travel, through-hole requirements and the overall compatibility of the chuck system before installation.
What information is needed for quotation?
Provide the chuck model, machine model, spindle nose, spindle through-hole, drawbar thread, required stroke, target thrust, pressure range and whether a hollow or solid cylinder is required.