Airtac SGCJ125~160 Adjustable Cylinder SGCJ125X125-20S
The AirTAC Airtac SGCJ125~160 Adjustable Cylinder SGCJ125X125-20S is a genuine double acting, adjustable stroke ISO 15552 (orig. ISO 6431) tie-rod air cylinder with a Ø125mm bore and 125mm 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
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting, adjustable stroke
- Rod threadM27×2.0
- CushionAdjustable, 40 mm
About the Airtac SGCJ125~160 Adjustable Cylinder SGCJ125X125-20S
Generating 6136 N of push force at 0.5 MPa, this large-bore ISO 15552 tie-rod cylinder features a 125 mm bore and an on-site extend-shortening window. The external adjuster lets you trim the forward stroke by up to 20 mm, yielding a usable extend range of 105 to 125 mm without swapping the unit. The nominal 125 mm stroke remains the maximum, while the retract end stays fixed. It handles a safe working load of roughly 3682 N, which means you can vertically lift about 313 kg with a 2:1 margin.
Four steel tie rods clamp the aluminum barrel to the covers for high structural rigidity, and the bore dictates a G1/2 air port. Because the -S suffix denotes a built-in piston magnet, this SKU is fully compatible with CMSG, DMSG, and EMSG electronic or reed switches. The standard TPU seals deliver long service life, though a Viton H option extends the operating temperature range up to 150 C. Remember that the adjustable air cushions only decelerate the piston near the end caps; they do not function as a load-holding brake.
Airtac SGCJ125~160 Adjustable Cylinder SGCJ125X125-20S Technical Specifications
| Model | Airtac SGCJ125~160 Adjustable Cylinder SGCJ125X125-20S |
|---|---|
| Series | SGC ISO 15552 tie-rod cylinder |
| Bore size | Ø125 mm |
| Stroke | 125 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 SGCJ125X125-20S
| SGCJ | ISO 15552 tie-rod cylinder (adjustable-stroke type). |
|---|---|
| 125 | Bore size in mm (125 / 160 / 200 / 250). |
| ×125 | 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 SGCJ125X125-20S Is Used
Press Fit Tuning
Dial in the exact insertion depth of bearings on an assembly line by trimming the extend stroke up to 20 mm on-site to compensate for material tolerances.
Transfer Stopper
Act as a heavy-duty stopping gate where the 125 mm stroke is slightly shortened to match varying pallet heights without repositioning the cylinder mount.
Vertical Lift Gate
Lift a 313 kg safety barrier vertically, relying on the 6136 N thrust at 0.5 MPa and adjusting the end position to clear different vehicle profiles.
Is the Airtac SGCJ125~160 Adjustable Cylinder SGCJ125X125-20S the Right Cylinder?
When sizing this model against its neighbors, the 125 mm bore provides 6136 N of push at 0.5 MPa, sitting at the lower edge of the SGCJ range below the 160 mm option which outputs 10053 N. The 20 mm adjustable stroke window is highly beneficial for fine-tuning end positions on-site or keeping a single spare cylinder that spans multiple stroke variants. You can mount it using FA, LB, TC, FTC, TCM1, or TCM2 hardware. The integrated magnet supports CMSG/DMSG/EMSG sensors directly. For any stroke length at or exceeding 500 mm, always use external guide rails to prevent excessive side-loading on the rod.
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 SGCJ125X125-20S FAQ
At 0.5 MPa it provides 6136 N of push and 5734 N of pull. At 0.7 MPa the push is 8590 N and the pull is 8028 N. The theoretical maximum force is 1251 kgf at 1.0 MPa. The air port size is G1/2.
The -20 code means an external stop screw allows you to shorten the extend stroke by up to 20 mm on-site. The usable extend range is 105 to 125 mm, with the nominal 125 mm being the maximum. The retract end is fixed, and this stop only sets the end position, not a load lock.
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