Airtac SCJ40 Standard Cylinder SCJ40X700-100S
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X700-100S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø40mm bore, 700mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke700 mm
- Stroke adjust-100 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X700-100S
The SCJ40X700-100S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, delivering 628 N of push force at 0.5 MPa. A rear-cap adjusting screw provides up to 100 mm of stroke-end reduction, letting you fine-tune the piston stop position for commissioning, format changes, or wear compensation without removing the cylinder. The 40 mm bore uses a 16 mm diameter rod and PT1/4 ports.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors on the barrel for reliable end-of-stroke detection. The tie-rod construction and TPU seals suit standard operating temperatures from -20 to +70 °C. The body length A is 185 mm, and the maximum standard stroke for this bore is 1200 mm.
Airtac SCJ40 Standard Cylinder SCJ40X700-100S Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X700-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 700 mm |
| Stroke adjustment | Up to 100 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SCJ (adjustable-stroke) datasheet. The rear adjusting screw sets the stroke end position; force is the same as the equivalent single-rod SC bore. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
SCJ is single-rod, so force matches the equivalent SC bore: push uses the full bore area, pull subtracts the rod area. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
Model Code: Airtac SCJ40 Standard Cylinder SCJ40X700-100S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×700 | Nominal (maximum) stroke length in mm. |
| -100 | Adjustable-stroke range in mm (options 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod, fixed stroke), SCD (double rod), SCT (multi-position). SCJ mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SCJ40 Standard Cylinder SCJ40X700-100S Is Used
End-Stop Fine-Tuning
The 100 mm adjustment screw allows operators to dial in the exact stroke end position during machine commissioning or after tooling changes, eliminating the need for custom spacer blocks.
Product Format Changeover
Quickly adapt a pusher or diverter station to handle different box or pallet sizes on a packaging line by adjusting the cylinder's stroke end without mechanical rework.
Wear Compensation
In clamping or pressing fixtures, the adjustable stroke can be extended slightly over time to compensate for wear on contact pads or tooling, maintaining consistent clamping force.
Is the Airtac SCJ40 Standard Cylinder SCJ40X700-100S the Right Cylinder?
Choose the SCJ40 when your application needs roughly 628 N of push force at standard plant air. If you require more force, stepping up to the 50 mm bore (SCJ50) provides 982 N of push at the same 0.5 MPa pressure. For applications that do not require stroke adjustment, a fixed-stroke SC40X700 cylinder is a simpler, more economical alternative. This cylinder is a direct dimensional replacement for another AirTAC SCJ40X700-100S with a PT port and basic mounting.
At a 700 mm stroke, the extended rod is susceptible to side loading and bending. For applications with a radial load or guided payload, consider adding an external guide rail or switching to a guided cylinder assembly to protect the rod and seals from premature wear.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-100)
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear adjusting screw, then lock it before running.
- check Adjust end cushion screws for smooth stops.
- check Use SCJ mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCJ40 Standard Cylinder SCJ40X700-100S FAQ
A screw mechanism in the rear cap limits the piston's retraction. Turning the screw changes the stroke end position by up to 100 mm, making the effective stroke adjustable between 600 mm and the nominal 700 mm maximum. It does not adjust the cylinder's force or speed.
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. The pull force is lower because the 16 mm rod reduces the effective piston area on the return stroke. The maximum push force at the 0.9 MPa operating limit is 1130 N.
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