Airtac SCJ100 Standard Cylinder SCJ100X70-50
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X70-50 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. Ø100mm bore, 70mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke70 mm
- Stroke adjust-50 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X70-50
The SCJ100X70-50 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke. A rear-cap adjusting screw lets you shorten the stroke end by up to 50 mm, giving a 70 mm nominal maximum that can be dialed down to 20 mm for commissioning, format changes, or wear take-up. At 0.5 MPa it delivers 3927 N push and 3681 N pull, driven by a 25 mm rod through PT1/2 ports.
This 100 mm bore tie-rod cylinder uses an adjustable air cushion (29 mm length) for smooth deceleration and operates from 0.15 to 1.0 MPa at speeds of 30-800 mm/s. The body length A(SCJ) is 245 mm, slightly longer than the fixed-stroke SC version to house the adjusting mechanism. It accepts the SCJ mounting subset: basic, FA front flange, LB foot, or TC centre trunnion with TCM1 bracket.
Airtac SCJ100 Standard Cylinder SCJ100X70-50 Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X70-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 70 mm |
| Stroke adjustment | Up to 50 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/2 |
| 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, 29 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.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 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 SCJ100 Standard Cylinder SCJ100X70-50
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×70 | 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.
Where the Airtac SCJ100 Standard Cylinder SCJ100X70-50 Is Used
Commissioning & Setup
Dial in the exact stroke end during machine commissioning without cutting rods or adding external hard stops. The 50 mm adjustment range lets technicians fine-tune the actuator position quickly on the factory floor.
Product Changeover
When packaging lines switch between box sizes or product formats, the SCJ100X70-50 adapts in minutes. Adjust the stroke end to match the new product dimensions without swapping the cylinder or reprogramming complex servo axes.
Wear Compensation
In clamping or pressing fixtures, tooling wear gradually shifts the end position. The rear adjusting screw lets operators recover the precise clamp point without disassembling the tooling, extending fixture life and maintaining part quality.
Is the Airtac SCJ100 Standard Cylinder SCJ100X70-50 the Right Cylinder?
Choose the SCJ100 when you need push force around 3927 N at 0.5 MPa and the ability to fine-tune the stroke end on the machine. If your load requires more force, step up to the SCJ125 bore, which provides 6136 N push at the same pressure. For a lighter, more compact solution, the SCJ80 bore delivers 2513 N push. If the stroke never needs field adjustment, a fixed-stroke SC100 cylinder is a simpler, cost-effective alternative.
For a drop-in replacement, match the 100 mm bore, 70 mm nominal stroke, 50 mm adjust range, PT port thread, and basic mounting. If you need position sensing, order the SCJ100X70-50S variant with a built-in magnet for CMSG/DMSG/EMSG sensors. Since the 70 mm stroke is short, rod bending under side load is unlikely, but for any off-axis force, use an external guide or switch to a guided cylinder.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-50)
- ✓ 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 SCJ100 Standard Cylinder SCJ100X70-50 FAQ
At 0.7 MPa (typical factory air), the SCJ100 bore generates 5497 N push force and approximately 5153 N pull force on the retract stroke. At the maximum operating pressure of 0.9 MPa, push force reaches 7068 N. The push force is always higher than pull because the single rod reduces the piston area on the retract side.
Yes, if you need the 50 mm stroke-end adjustment range. The SCJ100 shares the same mounting footprint, port size (PT1/2), and rod thread (M20x1.5) as the SC100. Ensure your machine can accommodate the slightly longer SCJ body length (245 mm A dimension) that houses the rear adjusting screw. If you only need the full 70 mm stroke with no adjustment, the SC100X70 is a direct, lower-cost fit.
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