Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X70-40B
The AirTAC ACEJ12 Adjustable Compact Cylinder ACEJ16X70-40B is a genuine double acting, double rod, adjustable stroke ISO 21287 compact air cylinder with a Ø16mm bore and 70mm 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.
- BoreØ16 mm
- Stroke70 mm
- Port sizeM5×0.8
- Acting typeDouble acting, double rod, adjustable stroke
- Rod threadM4×0.7
- CushionFixed TPU bumper (both ends)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X70-40B
The ACEJ16X70-40B is a double acting ISO 21287 compact cylinder with an adjustable extend stroke. The external stop screw trims the 70 mm stroke by up to 40 mm on site, so one cylinder covers a 30-70 mm working range without reordering.
The hard-anodized aluminium body with an S45C hard-chrome plated 8 mm rod keeps the mounting length about 50% shorter than an ISO 15552 profile cylinder, ideal for tight jigs and guarding. Speed range is 30-500 mm/s and the fixed TPU bumper at both ends absorbs end-of-stroke impact.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X70-40B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X70-40B |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø16 mm |
| Stroke | 70 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.
Theoretical Output Force (Ø16mm)
| 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).
Model Code: Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X70-40B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 16 | Bore size in mm. |
| ×70 | Stroke length in mm. |
| -40 | 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.
Where the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X70-40B Is Used
Small-parts press fitting
Presses dowel pins or bushings into plastic housings on electronics assembly benches, using the 30-70 mm adjustable range to match varying part heights.
Carton flap tuck-down
Folds and holds light carton flaps on a packaging line, where the short body fits inside tight machine guarding and 100.5 N is ample for the flap force.
Fixture presence check-out
Ejects finished brackets from a machining fixture; add the optional -S magnet code if CMSE or DMSE switch feedback on part ejection is later required.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X70-40B the Right Cylinder?
The 40 mm window means you can dial the extend stroke anywhere from 30 to 70 mm, but remember the stop screw is a mechanical end stop only - on air loss the piston drifts, so it is not a load-holding brake. The B code gives a male rod thread and the port is M5x0.8 with PT body threads. If you need position sensing, order the -S variant, since this model has no magnet and CMSE / DMSE switches require it. FA flange or LB foot mounting bolts straight to the ISO 21287 face.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Short stroke fits the compact body
- ✓ Port/thread type (PT / G)
- ✓ Add -S if you need the magnet for sensors
- ✓ Rod type (female / male B) & mount (FA/LB/CA)
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Compact body: keep the stroke short and avoid side load on the rod.
- check Do not dismantle the threaded front/back covers.
- check Keep speed within the rated range; the TPU bumper absorbs stroke-end energy.
- check Installation by qualified personnel per AirTAC docs.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ16X70-40B FAQ
Push is 100.5 N and pull 75.4 N at 0.5 MPa; at 0.7 MPa push is 140.7 N and pull 105.6 N, with a theoretical maximum of 20.5 kgf at 1.0 MPa. It is double acting with a 70 mm stroke adjustable down to 30 mm via the 40 mm stop-screw window, runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, temperature -20 to +70 C, with a fixed TPU bumper at both ends and an M5x0.8 port.
The ISO 21287 compact body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into shallow fixtures and guarded frames. Mounting options include FA flange and LB foot plus I/Y rod knuckles on the standard ISO 21287 face. Position sensing is possible only when the optional -S magnet is ordered, enabling CMSE or DMSE switches; this model without -S carries no magnet.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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