Airtac SCJ50 Standard Cylinder SCJ50X275-40S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X275-40S 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, 275mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke275 mm
- Stroke adjust-40 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X275-40S
The SCJ50X275-40S delivers a nominal 275 mm stroke with a 40 mm rear-end adjustment range, letting you fine-tune the stop position without swapping the cylinder. In the 50 mm bore class it generates 982 N of push force at 0.5 MPa and up to 1767 N at 0.9 MPa, driven by a 20 mm diameter piston rod.
This model includes a built-in magnet (suffix -S), so CMSG/DMSG/EMSG reed or solid-state sensors clamp directly onto the tie-rod barrel for end-of-stroke or mid-position sensing. The adjustable screw only sets the stroke end—it does not alter force or speed—and the standard air cushion decelerates the piston over the final 21 mm of travel.
Airtac SCJ50 Standard Cylinder SCJ50X275-40S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X275-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 275 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 SCJ50X275-40S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×275 | 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 SCJ50X275-40S Is Used
Commissioning & Setup
Dial in the exact stop position during machine commissioning with the 40 mm rear screw adjustment, eliminating the need to shim or reposition the cylinder body.
Format Changeover
Quickly adapt the stroke end for different product sizes on packaging or assembly lines without mechanical rework, reducing downtime between batches.
Wear Compensation
Take up mechanical play or tooling wear over time by slightly extending the effective stroke via the rear cap screw, maintaining consistent process engagement.
Is the Airtac SCJ50 Standard Cylinder SCJ50X275-40S the Right Cylinder?
Choose this 50 mm bore when your application needs roughly 982 N of push at standard plant air. If you can accept lower force, stepping down to the 40 mm bore (628 N push at 0.5 MPa) saves space and air consumption; if you need more, the 63 mm bore provides 1559 N push at the same pressure. For a fixed-stroke application where field adjustment is unnecessary, the standard SC50X275 is a simpler alternative.
At 275 mm of stroke, rod deflection under side load is a consideration—mount the load in-line with the rod axis or add an external guide rail. When replacing an existing unit, match the bore, nominal stroke, 40 mm adjust range, PT port thread, basic mounting, and the -S magnet option to retain sensor compatibility.
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 SCJ50X275-40S FAQ
At 0.5 MPa the push force is 982 N and the pull force is 825 N (the pull force is lower because the 20 mm rod reduces the piston area on the return side). At the maximum operating pressure of 0.9 MPa, push force reaches 1767 N.
The adjust range must match your original cylinder's stroke-end adjustment requirement. The -40 suffix provides 40 mm of field-adjustable stroke shortening. If your process needs a different adjustment band, select the corresponding -10, -20, -30, -50, -75, or -100 variant with the same bore and nominal stroke.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SCJ Adjustable-Stroke Cylinders
Request a Quote for Airtac SCJ50 Standard Cylinder SCJ50X275-40S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.