The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X100-50 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, 100mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X100-50 is an 80 mm bore double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides up to 50 mm of field-adjustable stroke-end control. This lets you fine-tune the piston stop position without removing the cylinder or adding external hard stops, making commissioning and format changeovers significantly faster. With a 25 mm diameter piston rod and PT3/8 ports, it delivers a push force of 2513 N at 0.5 MPa and up to 4523 N at 0.9 MPa.
This adjustable-stroke actuator uses a tie-rod construction with a body length of 239 mm and an integrated variable air cushion of 28 mm to decelerate the piston smoothly. The nominal 100 mm stroke is the maximum travel, and the -50 adjustment screw shortens the stroke end by up to 50 mm in the field. Operating on filtered air from 0.15 to 1.0 MPa, it is suited for applications where the end position must be dialled in precisely after installation or adjusted periodically for wear take-up.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X100-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 100 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. |
| ×100 | 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.
Dial in the exact end-of-stroke position during machine commissioning without fabricating custom shims or hard stops. The 50 mm adjustment range allows fine-tuning after the cylinder is mounted and plumbed.
Quickly adapt the stroke length for different product sizes on packaging or sorting lines. The rear screw adjustment eliminates the need to swap cylinders or mechanical stops when changing formats.
Compensate for tooling or gripper wear over time by advancing the stroke end in small increments. This maintains precise positioning in clamping, pressing, or assembly fixtures without disassembly.
Choose the SCJ80X100-50 when you need to set the exact stroke end position on the machine, such as during a trial run or when switching between product formats. If you require a fixed, non-adjustable stroke, the standard SC80X100 single-rod cylinder is a simpler alternative. For a direct replacement, match the 80 mm bore, 100 mm nominal stroke, 50 mm adjust range, PT3/8 port thread, and basic mounting configuration. If your force requirement is lower, the SCJ63 series provides 1559 N of push at 0.5 MPa; for higher force, the SCJ100 series delivers 3927 N at the same pressure. For strokes of 300 mm or longer, evaluate side-loading on the 25 mm rod and consider adding an external guide rail or switching to a guided cylinder to prevent rod bending.
Adjustable-stroke checklist
The push force is 2513 N at 0.5 MPa and 4523 N at 0.9 MPa. The pull force is 2268 N at 0.5 MPa because the 25 mm piston rod reduces the effective area on the retract side. The adjusting screw does not change the force output.
The SCJ80X100-50 can replace an SC80X100 if you need the adjustable stroke feature and the slightly longer body length (239 mm) fits your space. You must match the 80 mm bore, PT3/8 ports, and mounting style. The SCJ adds a rear adjusting screw; if you do not need stroke adjustability, the fixed-stroke SC is a more compact choice.
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