Airtac SGC Standard Cylinder SGC125X20H
The AirTAC Airtac SGC Standard Cylinder SGC125X20H is a genuine double acting ISO 15552 (orig. ISO 6431) tie-rod air cylinder with a Ø125mm bore and 20mm stroke, G1/2 air ports and adjustable end cushioning. Its large-bore tie-rod build delivers high thrust and drops into standardized ISO 15552 mounting on heavy automation.
- BoreØ125 mm
- Stroke20 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- CushionAdjustable, 40 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SGC Standard Cylinder SGC125X20H
Built for high-temperature short-stroke actuation, this double-acting ISO 15552 tie-rod cylinder generates 6136 N of push force at 0.5 MPa. The 125 mm bore uses a G1/2 port and a 32 mm rod, while four steel tie rods clamp the aluminium barrel to the covers for high structural rigidity. Because this SKU carries the H seal option, its FKM Viton elastomers raise the operating ceiling to 150 C, replacing the standard TPU profile. Plan for roughly 3682 N of real work at 0.5 MPa, which equates to lifting about 313 kg vertically with a 2:1 safety margin.
The 20 mm stroke moves a 40 mm adjustable air cushion at each end, though the primary stopping duty relies on the external mechanics given the minimal travel. The two-way piston seal maintains an internal oil reservoir to lubricate the bore for long service life. As an ISO 15552 mounting-interface unit, it drops directly into existing large-bore fixtures without custom brackets.
Airtac SGC Standard Cylinder SGC125X20H Technical Specifications
| Model | Airtac SGC Standard Cylinder SGC125X20H |
|---|---|
| Series | SGC ISO 15552 tie-rod cylinder |
| Bore size | Ø125 mm |
| Stroke | 20 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2.0 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SGC datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Thread options: PT (blank) / G. TPU seals are not available for the Ø250 bore (NBR / Viton only).
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SGC Standard Cylinder SGC125X20H
| SGC | ISO 15552 tie-rod cylinder (double-acting type). |
|---|---|
| 125 | Bore size in mm (125 / 160 / 200 / 250). |
| ×20 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
SGC-family variants: SGC (double acting), SGCD (double rod), SGCJ (adjustable stroke). Mounting: LB / FA / FB / CA / CB / CR / TC / FTC / TCM1 / TCM2. Seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SGC Standard Cylinder SGC125X20H Is Used
Hot Stamp Press Ejection
Uses the 6136 N thrust to eject dense molded parts from a heated platen, where the Viton H seals survive the 150 C ambient radiant heat without degrading.
High-Temp Clamp Actuation
Secures heavy castings in a welding fixture with a 20 mm stroke, relying on the rigid four-tie-rod construction to maintain alignment under shock loads.
Aluminium Extrusion Cutoff
Cycles a shear blade through hot aluminium profiles, utilizing the G1/2 port for rapid 30-500 mm/s actuation in a thermally demanding environment.
Is the Airtac SGC Standard Cylinder SGC125X20H the Right Cylinder?
When sizing this actuator, the 125 mm bore sits at the lower end of the SGC family, so stepping up to the 160 mm bore raises the 0.5 MPa push force to 10053 N. If the 6136 N output is excessive for your cycle, you must drop out of the SGC range entirely to find a smaller standard cylinder. Because this 20 mm stroke is very short, side-load bending stresses on the 32 mm rod are minimal, but precise rod alignment is still critical to prevent seal wear.
This specific SKU lacks the S magnet designation, meaning it cannot accept CMSG, DMSG, or EMSG magnetic switches for position sensing; you must physically mount external limit switches or select the SGC125X20HS variant. Furthermore, a standard double-acting cylinder drifts when air pressure is lost or the valve is centred. The end cushions only decelerate the piston near stroke limits and do not act as a brake, so install an external rod lock or pilot-operated check valve if the load must be held in place.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Long-stroke side load — support the rod end
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load; support long strokes at the rod end.
- check Set cushions to minimum, then release gradually.
- check Use correct mounting accessory (LB/FA/FB/CA/CB/CR/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SGC Standard Cylinder SGC125X20H FAQ
This 125 mm bore cylinder features a G1/2 air port and generates 6136 N push / 5734 N pull at 0.5 MPa, and 8590 N push / 8028 N pull at 0.7 MPa. The theoretical maximum force is 1251 kgf at 1.0 MPa.
No, this specific SKU does not include the S magnet option, so CMSG, DMSG, or EMSG switches cannot be used. You must physically mount external sensors or upgrade to the SGC125X20HS model to enable magnetic sensing.
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