Airtac SCJ40 Standard Cylinder SCJ40X450-100
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X450-100 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, 450mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke450 mm
- Stroke adjust-100 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X450-100
The AirTAC SCJ40X450-100 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. Its rear-cap adjusting screw provides up to 100 mm of retraction from the nominal 450 mm stroke, allowing fine-tuning during commissioning or format changes without removing the cylinder. The 40 mm bore delivers 628 N of push force at 0.5 MPa, rising to 1130 N at the maximum operating pressure of 0.9 MPa.
This model uses a 16 mm diameter piston rod with an M12x1.25 thread and PT1/4 ports. The body length A(SCJ) is 185 mm, and the adjustable air cushion is 21 mm long to decelerate the piston smoothly. The cylinder operates on filtered air from 0.15 to 1.0 MPa across a temperature range of -20 to +70 °C, with a standard speed range of 30-800 mm/s.
Airtac SCJ40 Standard Cylinder SCJ40X450-100 Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X450-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 450 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 SCJ40X450-100
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×450 | 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 SCJ40X450-100 Is Used
Commissioning & Setup
Fine-tune the end-stop position during machine commissioning without swapping cylinders or machining external hard stops, saving significant setup time on automated assembly lines.
Variable Part Stops
Adjust the stroke end to accommodate different product sizes on a conveyor or packaging line, enabling quick format changeovers for short-run production batches.
Wear Compensation
Compensate for gradual tooling or gripper wear in clamping and pressing operations by incrementally extending the stroke end, maintaining consistent process force and position over time.
Is the Airtac SCJ40 Standard Cylinder SCJ40X450-100 the Right Cylinder?
Choose the SCJ40X450-100 when you need to dial in a precise end position on a 40 mm bore platform. If your force requirement is lower, the 32 mm bore SCJ32 series offers 402 N of push at 0.5 MPa; for a step up in force, the SCJ50 series provides 982 N. The 100 mm adjustment range on this model is particularly useful for accommodating varying workpiece thicknesses or tooling wear over long production runs. For applications requiring a fixed, repeatable stroke without field adjustment, the standard SC series is a simpler and more cost-effective alternative.
At a 450 mm stroke, side-loading and rod deflection become important considerations. Ensure the load is guided externally or use a rod-alignment coupler to prevent bending moments on the piston rod. For direct replacement, match an AirTAC SCJ cylinder with a 40 mm bore, 450 mm nominal stroke, 100 mm adjust range, PT ports, and basic mounting.
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 SCJ40X450-100 FAQ
The push force is 628 N at 0.5 MPa, 879 N at 0.7 MPa, and 1130 N at the maximum operating pressure of 0.9 MPa. The pull force is lower due to the single 16 mm rod, providing 528 N at 0.5 MPa.
A screw on the rear cap limits how far the piston can retract, effectively shortening the stroke end from its 450 mm nominal maximum by up to 100 mm. It adjusts the end position only and does not alter the cylinder's force or speed capabilities.
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