Airtac SCJ50 Standard Cylinder SCJ50X150-40S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X150-40S 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, 150mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke150 mm
- Stroke adjust-40 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X150-40S
The SCJ50X150-40S delivers a 50 mm bore single-rod double-acting stroke with a rear-end adjusting screw that lets you fine-tune the stroke end by up to 40 mm in the field. At 0.5 MPa it pushes 982 N and pulls 825 N, suiting medium-force positioning tasks where the exact end point needs dialling in during commissioning or after wear.
A built-in magnet (the -S suffix) allows CMSG/DMSG/EMSG sensors to clamp directly onto the tie-rod barrel for non-contact end-of-stroke sensing. The 20 mm rod with M16x1.5 thread, PT1/4 ports, and 21 mm air cushion keep it compatible with standard SCJ50 mountings—this unit is supplied in the basic configuration without brackets.
Airtac SCJ50 Standard Cylinder SCJ50X150-40S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X150-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 150 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 SCJ50X150-40S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×150 | 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 SCJ50X150-40S Is Used
Commissioning & Setup
Dial in the exact push stroke during machine bring-up. The 40 mm screw adjustment lets technicians fine-tune the end position without swapping cylinders or machining hard stops.
Format Changeovers
On packaging or labelling lines, quickly reset the stroke for different product sizes. The SCJ50X150-40S handles 982 N of push force, enough for many medium-duty pusher and diverter roles.
Wear Compensation
In clamping or pressing fixtures, the adjustable stroke end takes up pad wear over time. A simple screw turn restores the original clamp position without disassembling the tooling.
Is the Airtac SCJ50 Standard Cylinder SCJ50X150-40S the Right Cylinder?
Choose the SCJ50 when you need field-adjustable stroke in the 50 mm bore class. If your force requirement grows, the SCJ63 offers 1559 N push at 0.5 MPa; if you can accept a fixed stroke and a slightly shorter body, the standard SC50 is a simpler alternative. For a direct replacement, match the 50 mm bore, 150 mm nominal stroke, 40 mm adjust range, PT port thread, basic mounting, and the -S magnet option.
At a 150 mm nominal stroke, rod bending under side load is generally not a concern for the 20 mm rod in typical pneumatic applications, but avoid direct lateral forces on the rod end. If the load path introduces a bending moment, add an external guide rail or switch to a guided cylinder.
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 SCJ50X150-40S FAQ
At 0.5 MPa it delivers 982 N pushing and 825 N pulling. At the maximum operating pressure of 1.0 MPa, theoretical push force reaches 1963 N. The pull force is lower because the single rod reduces the piston area on the return side.
Yes, if you need the 40 mm stroke-end adjustment. The SCJ50X150-40S shares the same 50 mm bore, rod diameter, port size, and mounting interfaces as the SC50 series. Ensure your machine has clearance for the slightly longer rear cap that houses the adjusting screw.
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