The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X70-20 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø80mm bore, 70mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X70-20 is an 80 mm bore double-acting single-rod cylinder with a rear adjusting screw that provides up to 20 mm of field-adjustable stroke-end control. This model delivers 2513 N of push force at 0.5 MPa, making it a robust choice for mid-range pneumatic tasks where fine-tuning the end position is required without swapping the cylinder.
With a 25 mm diameter piston rod and PT3/8 ports, the SCJ80X70-20 integrates into existing systems easily. Its 28 mm air cushion decelerates the piston smoothly, and the body length A(SCJ) of 239 mm helps with machine layout planning. The adjustable stroke is ideal for commissioning adjustments or accommodating minor variations in workpiece positioning.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X70-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 70 mm |
| Stroke adjustment | Up to 20 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. |
| ×70 | Nominal (maximum) stroke length in mm. |
| -20 | 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.
Fine-tune the end stop during initial machine setup to achieve precise positioning without mechanical modifications.
Quickly adjust the stroke for different product sizes on a packaging line, reducing downtime between batches.
Take up mechanical play or seal wear over time by slightly extending the effective stroke with the rear screw.
Choose the SCJ80X70-20 when you need to dial in the stroke end position on the machine. If the 2513 N push force at 0.5 MPa is insufficient, stepping up to the 100 mm bore provides 3927 N. For applications where the stroke is fixed after setup, the standard SC80X70 is a simpler alternative. A direct replacement must match the 80 mm bore, 70 mm nominal stroke, 20 mm adjust range, PT ports, and basic mounting.
Adjustable-stroke checklist
At 0.5 MPa, it provides 2513 N pushing and 2268 N pulling. The maximum push force at 0.9 MPa is 4523 N.
A screw in the rear cap allows you to shorten the stroke end by up to 20 mm from the nominal 70 mm, enabling field adjustment without disassembly.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.