
The AirTAC Airtac SDAJ80~100 Adjustable Super Slim Cylinder SDAJ100X55-50S is a genuine double-acting COMPACT cylinder (Ø100mm bore) whose extend end-position is set by an external M27×2.0 adjustment screw. You can dial the stroke anywhere from 5 to 55 mm on the machine — no shims, no part change.
The AirTAC SDAJ100X55-50S is a compact double-acting single-rod cylinder engineered for heavy-duty positioning where footprint matters. An external R (M27x2.0) adjuster screw lets you dial the extend stop down from the 55mm maximum to a 5mm minimum directly at the machine, eliminating the need for shims or part swaps during changeovers. The short riveted body significantly reduces axial mounting depth compared to conventional round-body or profile cylinders, fitting into tight high-force assemblies.
Because the adjuster sets the mechanical stop rather than altering the piston area, output force remains identical to a standard SDA of this bore, delivering 3927 N of push at 0.5 MPa. The piston features a built-in magnet for AirTAC reed or electronic switches, and end-of-travel deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion.
| Model | Airtac SDAJ80~100 Adjustable Super Slim Cylinder SDAJ100X55-50S |
|---|---|
| Series | SDAJ compact adjustable-stroke cylinder |
| Bore size | Ø100 mm |
| Max stroke | 55 mm |
| Adjustable range | 5 – 55 mm |
| Adjuster thread (R) | M27×2.0 |
| Port size | PT3/8 |
| Acting type | Double acting |
|---|---|
| Rod end thread | M18×1.5 F / M26×1.5 male (B) |
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Fixed NBR bumper (both ends) |
The adjustment screw shortens the extend stroke by up to 50 mm. Force is unchanged from a standard SDA of the same bore. Specifications follow the official AirTAC SDAJ datasheet.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3525 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Force matches a standard SDA of the same bore; the adjuster only sets the stop position, not the area. Actual usable force is lower than theoretical due to friction.
| SDAJ | Compact double-acting cylinder with adjustable stroke. |
|---|---|
| 100 | Bore size in mm. |
| ×55 | Maximum stroke length in mm. |
| -50 | Adjustable window (10/20/30/40/50/75/100 mm). |
| S / B | S = magnet; B = male-thread rod (both optional). |
Thread: PT standard. Related SDA-family variants: SDA (fixed stroke), SDAD (double rod), SSA/STA (single acting), SDAT (duplex), SDAW (duplex-end).
Dial in the exact 5-55mm extend stop for pressing heavy bearings without swapping physical spacers, leveraging the 3927 N push force at 0.5 MPa.
Utilize the compact riveted body to save axial depth in tight machinery layouts while delivering up to 801 kgf of theoretical max thrust for metal forming tasks.
Quickly reposition the mechanical stop via the M27x2.0 adjuster screw during product changeovers, adapting the extend stroke to various part heights on the fly.
When sizing this 100mm bore actuator, compare its 3927 N push at 0.5 MPa against the neighboring SDAJ80, which yields 2513.3 N at the same pressure. Stepping up to this 100mm unit provides a robust 56% increase in thrust, making it ideal for heavier payloads. A practical safe working load is approximately 2356 N (about 60% of the 0.5 MPa figure), translating to a vertical lift capacity of roughly 200.2 kg with a 2:1 safety margin. Choose this specific model if your fixture requires on-site stroke tuning within the 5-55mm window, a PT3/8 port, a 32mm rod, and a built-in magnet (-S) for switch sensing.
Remember that a plain SDAJ does not hold position or carry a load if air pressure drops or the valve is centered; the piston will drift, and the fixed NBR bumper only decelerates near the stroke end without acting as a lock. For suspended or vertical loads that must remain secure without live pressure, you must integrate an external rod lock or a pilot-operated check valve. Confirm your requirements for the female M18x1.5 rod-end thread and the 50mm adjustment window before finalizing the assembly.
Quick checklist
This 100mm bore double-acting cylinder provides 3927 N push and 3524.9 N pull at 0.5 MPa, and 5497.8 N push at 0.7 MPa. The theoretical maximum push is 801 kgf at 1.0 MPa. It operates between 0.15 and 1.0 MPa, with a proof pressure of 1.5 MPa, and runs at speeds of 30-500 mm/s.
The external R (M27x2.0) screw mechanically shortens the extend stroke by up to 50mm, allowing usable extensions between 5 and 55mm without changing parts. The -S suffix indicates a built-in piston magnet designed to trigger AirTAC reed or electronic solid-state switches mounted in the body grooves.
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