Airtac SGCJ125~160 Adjustable Cylinder SGCJ125X300-75S
The AirTAC Airtac SGCJ125~160 Adjustable Cylinder SGCJ125X300-75S is a genuine double acting, adjustable stroke ISO 15552 (orig. ISO 6431) tie-rod air cylinder with a Ø125mm bore and 300mm 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
- Stroke300 mm
- Port sizeG1/2
- Acting typeDouble acting, adjustable stroke
- Rod threadM27×2.0
- CushionAdjustable, 40 mm
About the Airtac SGCJ125~160 Adjustable Cylinder SGCJ125X300-75S
Delivering 6136 N of push force at 0.5 MPa, this large-bore ISO 15552 tie-rod cylinder integrates an external adjuster that shortens the extend stroke on-site by up to 75 mm. The nominal 300 mm stroke represents the maximum travel, allowing you to fine-tune the end position without physically changing the cylinder. A safe working load sits around 3682 N, which translates to lifting roughly 313 kg vertically with a 2:1 margin. Four steel tie rods clamp the aluminum barrel to the covers for structural rigidity, and the G1/2 port matches the 125 mm bore standard.
Because this SKU includes the -S magnet, it directly supports CMSG, DMSG and EMSG electronic or reed switches for position sensing. The adjustable air cushions at both ends absorb kinetic energy, but note that a plain cylinder drifts on air loss—the cushion only decelerates near the end of travel and never acts as a load lock. For suspended loads, pair this unit with an external rod lock or a pilot-operated check valve. Standard TPU seals handle temperatures from -20 to +70 C, while a Viton H option extends that range up to 150 C.
Airtac SGCJ125~160 Adjustable Cylinder SGCJ125X300-75S Technical Specifications
| Model | Airtac SGCJ125~160 Adjustable Cylinder SGCJ125X300-75S |
|---|---|
| Series | SGC ISO 15552 tie-rod cylinder |
| Bore size | Ø125 mm |
| Stroke | 300 mm |
| Acting type | Double acting, adjustable stroke |
| 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 SGCJ125~160 Adjustable Cylinder SGCJ125X300-75S
| SGCJ | ISO 15552 tie-rod cylinder (adjustable-stroke type). |
|---|---|
| 125 | Bore size in mm (125 / 160 / 200 / 250). |
| ×300 | 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 SGCJ125~160 Adjustable Cylinder SGCJ125X300-75S Is Used
Press Fit Dialing
Use the 75 mm extend-shortening window to micro-adjust the bottom dead center of a press fit operation without swapping the cylinder.
Transfer Stopper Tuning
Set the exact protrusion height of a pneumatic stopper block on a conveyor line by turning the external adjuster to match varying product sizes.
Shared Spare Inventory
Keep one 300 mm cylinder in maintenance stock and shorten the extend stroke on-site to replace a 250 mm or 275 mm unit in a pinch.
Is the Airtac SGCJ125~160 Adjustable Cylinder SGCJ125X300-75S the Right Cylinder?
When sizing this 125 mm bore unit, stepping down is not an option as it is the smallest in the SGCJ large-bore family, but stepping up to the 160 mm bore increases the 0.5 MPa push force to 10053 N if your application demands more thrust. The 75 mm adjustable window is particularly useful when you want to share a single spare cylinder across multiple stroke variants or dial in a precise end position on the machine. You can mount this model using FA, LB, TC, FTC, TCM1 or TCM2 hardware. Since the 300 mm stroke is relatively short, side-load stress is minimal, but for any stroke length approaching 500 mm or more, always use a guide rail to prevent rod binding. The built-in magnet means you can fit CMSG, DMSG or EMSG sensors directly into the profile groove.
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 SGCJ125~160 Adjustable Cylinder SGCJ125X300-75S FAQ
At 0.5 MPa this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa the push increases to 8590 N and the pull to 8028 N. The theoretical maximum force is 1251 kgf at 1.0 MPa. It uses a G1/2 air port.
The -75 code indicates an external adjuster that lets you shorten the extend stroke by up to 75 mm on-site. With a nominal 300 mm stroke, the usable extend length ranges from 225 mm to 300 mm. The retract end remains fixed, and the adjuster only sets the end position rather than locking the load.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Made to Order
Large-bore cylinders built to order — confirm lead time.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SGC Cylinders
Request a Quote for Airtac SGCJ125~160 Adjustable Cylinder SGCJ125X300-75S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.