Airtac SCJ40 Standard Cylinder SCJ40X100-30
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X100-30 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, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke100 mm
- Stroke adjust-30 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X100-30
The SCJ40X100-30 is a double-acting, single-rod pneumatic cylinder that adds a rear-cap adjusting screw to the proven SC platform. With a 40 mm bore and a nominal 100 mm stroke, the screw lets you shorten the stroke end by up to 30 mm in the field, giving commissioning technicians and line builders a fast way to dial in the exact travel without external hard stops. The 16 mm piston rod and 21 mm air cushion deliver controlled deceleration, and the tie-rod construction keeps the body length A(SCJ) to a compact 185 mm.
At 0.5 MPa supply pressure, this cylinder generates 628 N of push force and 528 N on the pull stroke, placing it in a mid-range force class suitable for clamping, diverting, and light press-fit tasks. The adjustable-stroke mechanism only shifts the stroke end position; it does not alter the bore, the force output, or the cylinder's 30-800 mm/s speed range. Standard PT1/8 ports and an M12x1.25 rod thread make it a drop-in for many general-automation manifolds.
Airtac SCJ40 Standard Cylinder SCJ40X100-30 Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X100-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 100 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 SCJ40X100-30
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×100 | 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 SCJ40X100-30 Is Used
Commissioning & Setup
During machine bring-up, the 30 mm rear screw lets technicians tweak the stroke end in seconds, eliminating the need to machine custom stop blocks or shim the cylinder mounting.
Wear Take-Up on Stops
On packaging lines where a pusher contacts a mechanical stop, the adjusting screw compensates for pad wear over time, maintaining consistent product placement without replacing the cylinder.
Format Changeover
When a carton erector switches between box sizes, the SCJ40X100-30 allows operators to quickly reset the pusher stroke to the new format, reducing changeover downtime compared to fixed-stroke cylinders.
Is the Airtac SCJ40 Standard Cylinder SCJ40X100-30 the Right Cylinder?
Choose the SCJ40X100-30 when you need to fine-tune the stroke end during setup or after wear, without adding external stops. If your load demands more push force, step up to the 50 mm bore SCJ50 series, which delivers 982 N push at 0.5 MPa. For applications where the stroke is fixed and never adjusted, the standard SC40X100 fixed-stroke cylinder is a simpler, slightly shorter alternative. When replacing an existing unit, match the bore (40 mm), nominal stroke (100 mm), adjust range (-30), and port thread (PT) to ensure identical mounting and performance. The SCJ40 accepts the FA front flange, LB foot mount, or TC centre trunnion from the SCJ accessory subset; note that FB flange and CA/CB clevis mounts are not available for this series.
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 SCJ40X100-30 FAQ
At 0.5 MPa, push force is 628 N and pull force is 528 N. At the maximum operating pressure of 0.9 MPa, push force reaches 1130 N. The pull force is lower because the 16 mm rod reduces the effective piston area on the return stroke.
Yes, if you need the adjustable stroke feature. The SCJ40X100-30 shares the same bore, rod size, port thread (PT1/8), and mounting accessories (FA, LB, TC) as the SC40 series. The body length A(SCJ) is 185 mm, which is slightly longer than the fixed-stroke version to accommodate the rear adjusting screw. Ensure the longer envelope fits your machine.
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