
The AirTAC ACEJ12 Adjustable Compact Cylinder ACEJ16X20-10SB is a genuine double acting, double rod, adjustable stroke ISO 21287 compact air cylinder with a Ø16mm bore and 20mm stroke, M5×0.8 air ports and a hard-anodized aluminium body. Its short compact envelope saves about 50% of the mounting length of an ISO 15552 profile cylinder.
The ACEJ16X20-10SB is a double acting, adjustable-stroke compact cylinder built to ISO 21287. A stop screw trims the extend stroke anywhere in the 10 mm window, so the usable stroke range is 10-20 mm, set on site with a screwdriver.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which makes this model a good fit for slim fixtures and guarded cells. The hard-anodized aluminium body carries an S45C hard-chrome plated 8 mm rod with a male thread (the B code), and a fixed TPU bumper at each end absorbs end-of-stroke shock. This unit carries the optional -S magnet, so CMSE / DMSE switches can be clipped onto the body for end-of-stroke detection.
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X20-10SB |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø16 mm |
| Stroke | 20 mm |
| Acting type | Double acting, double rod, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M4×0.7 |
| 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 TPU bumper (both ends) |
| Max standard stroke | Up to 75 mm |
Specifications follow the official AirTAC ACE-series (ISO 21287) datasheet. Body: hard-anodized aluminium alloy; piston rod: S45C carbon steel with hard-chrome plating. Rod type: female thread (blank) or male thread (B). Thread options: PT (blank) / G. A built-in magnet is OPTIONAL — add the -S code to fit CMSE / DMSE position sensors.
| Pressure | Force (both ways) |
|---|---|
| 0.5 MPa | 75 N |
| 0.7 MPa | 106 N |
| Max (@1.0 MPa) | 15 kgf |
ACEJ is double-rod: the rear rod that carries the stroke adjuster exits the rear cover, so both piston faces lose rod area. The rod-side (annular) area is used for both directions (conservative).
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 16 | Bore size in mm. |
| ×20 | Stroke length in mm. |
| -10 | Adjustable stroke window (mm the extend stroke can be shortened on site). |
| S | Optional built-in magnet for CMSE / DMSE sensors (omit for no magnet). |
| B | Rod type: B = male thread; blank = female thread. |
ACE-family variants: ACE (double acting), ASE / ATE (single acting push / pull), ACED (double rod), ACEJ (double rod, adjustable stroke), TACE / TACED (non-rotating twin-guide yoke). Mounting accessories: FA / FB flange, LB foot, CA / CB clevis, CR, SDB pivot, FTC; plus I and Y knuckles. Thread PT (blank) / G.
About 60 N of usable clamping force at 0.5 MPa holds small moulded housings during a screw-driving or ultrasonic-welding step without marking the part.
With the -S magnet fitted, CMSE / DMSE switches confirm extend and retract positions on a short indexing slide inside a compact test station.
Size this bore when your load sits near 60 N of working force at 0.5 MPa. Remember the stop screw only shortens the extend stroke - it is a mechanical end stop, not a mid-stroke lock, so the rod can drift if air is lost. Mount with FA flange or LB foot brackets, and note the male rod thread suits single knuckle or tooling plates directly. The fitted -S magnet enables CMSE / DMSE switch positioning feedback.
Quick checklist
At 0.5 MPa the 16 mm bore pushes 100.5 N and pulls 75.4 N; at 0.7 MPa those rise to 140.7 N and 105.6 N, with a theoretical maximum of 20.5 kgf at 1.0 MPa. The base stroke is 20 mm and the -10 code gives a 10 mm adjustment window, so the extend stroke can be trimmed to any length between 10 and 20 mm via the external stop screw. Operating pressure is 0.15-1.0 MPa (22-145 psi), speed 30-500 mm/s, and the air supply should be filtered to 40 um.
The cylinder follows ISO 21287, so the hard-anodized aluminium body is roughly 50% shorter in mounting length than an ISO 15552 profile cylinder, ideal where space is tight. Fixed TPU bumpers at both ends absorb end-of-stroke impact, and FA flange or LB foot mounting bolts onto the standard face. This model carries the optional -S magnet, so CMSE or DMSE reed and solid-state switches can be mounted in the body slots for position sensing.
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