The AirTAC AirTAC SDA40X35SB Compact Cylinder | 40mm Bore is a genuine double-acting COMPACT (thin) air cylinder with a Ø40mm bore and 35mm stroke, PT1/8 air ports and a riveted short body that saves mounting depth. Sensor slots around the body accept magnetic switches for position sensing.
The AirTAC SDA40X35SB is a double-acting, single-rod compact cylinder engineered to deliver 628.3 N of push force and 527.8 N of pull force at 0.5 MPa. Its riveted body design integrates the barrel, rear cover, piston, and rod into a highly condensed package, significantly reducing axial mounting depth where a conventional round-body unit would be too intrusive. The 40 mm bore features a hard-anodized inner wall and a two-way piston seal for extended operational life.
This specific configuration includes an -S piston magnet for direct compatibility with AirTAC reed or electronic switches mounted into the body grooves, plus a -B male M14x1.5 piston rod thread for secure mechanical coupling. End-of-stroke deceleration relies on a fixed NBR bumper rather than an adjustable air cushion, meaning external shock absorbers should be specified for high-energy cycling. Air connections utilize a PT1/8 port, and the unit operates efficiently across a 30-500 mm/s speed range.
| Model | AirTAC SDA40X35SB Compact Cylinder | 40mm Bore |
|---|---|
| Series | SDA compact (thin) cylinder |
| Bore size | Ø40 mm |
| Stroke | 35 mm |
| Acting type | Double acting |
| Port size | PT1/8 |
| Rod end thread | M8×1.25 female / M14×1.5 male (B) |
| 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 – 500 mm/s |
| Cushion | Fixed NBR bumper (both ends) |
| Max standard stroke | Up to 120 mm |
Specifications follow the official AirTAC SDA compact-cylinder datasheet. Confirm against the product label before installation. Port thread: PT (standard). Rod: female thread (blank) / male thread (B).
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| SDA | Compact (thin) double-acting cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×35 | Stroke length in mm. |
| S | Built-in magnet for magnetic-switch position sensing (omit = no magnet). |
| B | Male-thread piston rod (omit = female-thread rod). |
Thread: PT standard. Related SDA-family variants: SSA (single-acting push), STA (single-acting pull), SDAD (double rod), SDAJ (adjustable stroke), SDAT (duplex), SDAW (duplex-end).
Secures aluminum engine blocks during CNC machining, utilizing the 628.3 N extend force to lock parts firmly against locating pins without consuming excessive Z-axis envelope.
Drives mechanical arms to tuck corrugated box flaps prior to tape sealing, where the 35 mm stroke and fixed NBR bumpers endure rapid, repetitive cycling at up to 500 mm/s.
Actuates sorting pushers on parcel handling lines, using the male M14x1.5 rod end to attach rigid diverter arms that redirect packages into packing chutes.
When sizing this 40 mm bore actuator, evaluate your force margins carefully. Stepping down to the SDA32 yields 402.1 N of push at 0.5 MPa, while stepping up to the SDA50 provides 981.7 N. The SDA40X35SB provides a safe working load of roughly 377 N (about 60% of its 628.3 N capacity) and can vertically lift approximately 32 kg with a 2:1 safety margin. If your mechanism must maintain vertical position during air loss or valve centering, note that this standard cylinder will drift; the fixed NBR bumper only decelerates the end of stroke and acts as neither a lock nor a brake. An external rod lock or pilot-operated check valve is required for holding loads without live pressure. To order, confirm the 40 mm bore, 35 mm stroke, PT1/8 port, built-in magnet (S), and male M14x1.5 rod thread (B).
Quick checklist
At 0.5 MPa, this double-acting 40 mm bore cylinder provides 628.3 N of push (extend) force and 527.8 N of pull (retract) force. At 0.7 MPa, push increases to 879.6 N. The theoretical maximum push force is 128 kgf at the 1.0 MPa operating pressure limit.
It uses a fixed NBR bumper at each end to decelerate the piston near stroke completion; this is not an adjustable air cushion, so high-speed applications may need external shock absorbers. Furthermore, it does not hold position if air pressure drops—the piston will drift, requiring an external rod lock or pilot-operated check valve for fail-safe load holding.
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