The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X200-50S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø80mm bore, 200mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X200-50S is an 80 mm bore, double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. A rear-cap adjusting screw provides a 50 mm adjustment range, allowing the effective stroke to be shortened from the nominal 200 mm without removing the cylinder. The 25 mm diameter piston rod delivers 2513 N of push force and 2268 N of pull force at 0.5 MPa.
This model includes a built-in magnet (-S suffix), enabling direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the tie-rod barrel for precise end-of-stroke detection. The body length A(SCJ) is 239 mm, and the cylinder features a PT3/8 port, M20x1.5 rod thread, and a 28 mm adjustable air cushion for smooth deceleration.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X200-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 200 mm |
| Stroke adjustment | Up to 50 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT3/8 |
| Rod thread | M20×1.5 |
| 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, 28 mm |
| Max stroke | Up to 1500 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.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 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.
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×200 | Nominal (maximum) stroke length in mm. |
| -50 | 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.
During machine commissioning, the 50 mm adjustment screw allows engineers to dial in the exact stroke end position for a pusher or stop without fabricating custom shims or mechanical stops.
On a packaging line, the stroke can be quickly adjusted to accommodate different box sizes, adjusting the reach of a diverter arm without swapping the cylinder.
In a clamping application, the adjustable stroke end can be periodically reset to compensate for wear on gripper pads or tooling, maintaining consistent clamping force and position.
Select the SCJ80X200-50S when you need to fine-tune a 200 mm stroke end position by up to 50 mm on a machine, such as for commissioning or format changes. If 2513 N of push force at 0.5 MPa is insufficient, stepping up to the 100 mm bore provides 3927 N. If a fixed stroke is acceptable, the standard SC80X200 is a simpler, non-adjustable alternative. For a direct replacement, match an SCJ80 with a 200 mm nominal stroke, 50 mm adjust range, PT3/8 ports, and the -S magnet option.
For this 200 mm stroke, ensure the load is guided to prevent excessive side-loading on the 25 mm rod. If external guidance is not feasible, consider a guided cylinder or an external linear guide to protect the rod bearing and seal from premature wear.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. The maximum push force at the 0.9 MPa operating limit is 4523 N. The pull force is lower because the rod reduces the effective piston area on the return stroke.
Yes, the SCJ80X200-50S can replace an SC80X200 if you need the added benefit of a 50 mm field-adjustable stroke. The mounting dimensions and port locations are compatible. Ensure you match the port thread (PT) and magnet option (-S) for a direct functional replacement.
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