Airtac SCJ40 Standard Cylinder SCJ40X40-30TC
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X40-30TC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø40mm bore, 40mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke40 mm
- Stroke adjust-30 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X40-30TC
The SCJ40X40-30TC is a double-acting, single-rod pneumatic cylinder with a rear adjusting screw that provides up to 30 mm of field-adjustable stroke-end reduction. This allows fine-tuning of the piston stop position without changing the cylinder, ideal for commissioning and format changes. The 40 mm bore delivers 628 N of push force at 0.5 MPa, using a 16 mm diameter piston rod.
This model features a centre trunnion (TC) mount, supplied with the TCM1 bracket (order code F-SC40TC), allowing the cylinder to pivot for swinging loads. The body length A is 185 mm, with an adjustable air cushion of 21 mm at each end to decelerate the piston. It is a genuine AirTAC tie-rod cylinder, not an ISO 15552 profile unit.
Airtac SCJ40 Standard Cylinder SCJ40X40-30TC Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X40-30TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 40 mm |
| Stroke adjustment | Up to 30 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 SCJ40X40-30TC
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×40 | Nominal (maximum) stroke length in mm. |
| -30 | 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 SCJ40X40-30TC Is Used
Commissioning & Setup
The 30 mm adjustable stroke allows technicians to dial in the exact end-stop position during initial machine setup without swapping cylinders or machining hard stops.
Format Changeovers
Quickly adjust the stroke end for different product sizes on packaging or sorting lines. The centre trunnion mount lets the cylinder pivot, accommodating slight alignment variations.
Wear Compensation
Over time, tooling or gripper fingers may wear. The rear screw can be adjusted to take up this slack, maintaining precise positioning without replacing the actuator.
Is the Airtac SCJ40 Standard Cylinder SCJ40X40-30TC the Right Cylinder?
Choose this 40 mm bore for moderate push forces up to 628 N at 0.5 MPa. If you need more force, step up to the 50 mm bore (SCJ50, 982 N push at 0.5 MPa); for a lighter, more compact solution, the 32 mm bore provides 402 N. The SCJ is the right choice when you need to fine-tune the stroke end on the machine, rather than the fixed stroke of the standard SC series. For replacement, match the bore (40 mm), nominal stroke (40 mm), adjust range (-30), centre trunnion mount (TC), and PT port thread.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-30)
- ✓ 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 SCJ40X40-30TC FAQ
At 0.5 MPa, the push force is 628 N and the pull force is 528 N (due to the 16 mm rod area). At the maximum operating pressure of 0.9 MPa, the push force increases to 1130 N.
Yes, if you need the ability to fine-tune the stroke end. The SCJ40X40-30TC matches the mounting footprint of an SC40 with a TC mount, but the body is slightly longer to house the adjusting screw. Ensure the 30 mm adjustment range covers your stroke variation needs.
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