Airtac SCJ50 Standard Cylinder SCJ50X100-40
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X100-40 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø50mm bore, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke100 mm
- Stroke adjust-40 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X100-40
The SCJ50X100-40 is a double-acting, single-rod pneumatic cylinder from AirTAC that delivers 982 N of push force at 0.5 MPa, drawing from a 50 mm bore. Its defining feature is the rear-cap adjusting screw, which allows you to shorten the stroke end by up to 40 mm on the fly, making it ideal for commissioning trials or format changeovers where the final stop position needs fine-tuning without swapping the cylinder.
This model has a nominal 100 mm stroke and a 20 mm diameter piston rod with an M16x1.5 thread. The body length A(SCJ) is 194 mm, and it uses PT1/4 ports. The adjustable air cushion provides smooth deceleration over the last 21 mm of travel, and the standard TPU seals operate reliably from -20 to +70 °C.
Airtac SCJ50 Standard Cylinder SCJ50X100-40 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X100-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 100 mm |
| Stroke adjustment | Up to 40 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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 SCJ50 Standard Cylinder SCJ50X100-40
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×100 | Nominal (maximum) stroke length in mm. |
| -40 | 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 SCJ50 Standard Cylinder SCJ50X100-40 Is Used
Commissioning & Setup
Field-adjust the 40 mm stroke end to perfectly align tooling or stops during initial machine build, eliminating the need for shims or custom spacers.
Product Changeover
Quickly adapt the cylinder's end position for different product sizes on a packaging or sorting line, reducing downtime between batches.
Wear Compensation
Take up mechanical play or pad wear in clamping and pressing fixtures over time by advancing the screw, maintaining consistent force application.
Is the Airtac SCJ50 Standard Cylinder SCJ50X100-40 the Right Cylinder?
Choose the SCJ50X100-40 when you need to dial in the end position on a 50 mm bore platform. If you require more force, stepping up to the 63 mm bore provides 1559 N of push force at the same 0.5 MPa. For applications where the stroke is fixed and an adjusting screw is unnecessary, the standard SC50X100 is a simpler, more compact alternative. This SCJ model is a direct dimensional replacement for another AirTAC SCJ50 cylinder with the same 100 mm nominal stroke and 40 mm adjust range, matching PT ports and basic mounting.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-40)
- ✓ 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 SCJ50 Standard Cylinder SCJ50X100-40 FAQ
At 0.5 MPa, it provides 982 N of push force and 825 N of pull force. The maximum push force at the 0.9 MPa operating limit is 1767 N. The adjusting screw does not alter the cylinder's output force.
No, as a standard pneumatic cylinder, it will drift or drop if pressure is lost or the valve is centered. The stroke-adjust screw only sets the end position and does not act as a mechanical lock. An external rod brake or pilot-operated check valve is required for load holding.
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