Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30B is a genuine double acting, adjustable stroke ISO 21287 compact air cylinder with a Ø20mm bore and 75mm 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.
- BoreØ20 mm
- Stroke75 mm
- Port sizeM5×0.8
- Acting typeDouble acting, adjustable stroke
- Rod threadM6×1.0
- CushionFixed TPU bumper (both ends)
About the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30B
A double acting ISO 21287 compact cylinder, the ACEJ20X75-30B pairs a 20 mm bore with a 75 mm stroke that an external stop screw trims on site by up to 30 mm, giving a usable extend range of 45-75 mm. At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa those rise to 219.9 N and 164.9 N. The short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight fixtures where a full-length body cannot.
In practice, plan for roughly 94 N (about 9.6 kgf) of real work at 0.5 MPa, which corresponds to lifting about 8 kg vertically once a 2:1 margin is applied. The hard-anodized aluminium body carries a hard-chrome plated S45C rod, a fixed TPU bumper sits at both ends, and the B code gives a male rod thread. Note that the adjuster is a mechanical end stop only: on air loss the piston still drifts, so it never holds a load. The magnet is the optional -S code, so this unit has none and no CMSE / DMSE switch can be fitted.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30B |
|---|---|
| Series | ACEJ compact cylinder |
| Standard | ISO 21287 |
| Bore size | Ø20 mm |
| Stroke | 75 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M6×1.0 |
| 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 100 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 118 N |
| 0.7 MPa | 220 N | 165 N |
| Max (@1.0 MPa) | 32 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×75 | Stroke length in mm. |
| -30 | 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 (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 ACEJ20X75-30B Is Used
Ejector on a small assembly press
The 45-75 mm adjustable extend range lets one cylinder serve several part heights on a bench-top press, with 157.1 N at 0.5 MPa enough to push light components off a nest.
Stopper gate on a compact conveyor
Male rod thread (B code) accepts a custom gate arm, and the short ISO 21287 body fits under low conveyor frames where an ISO 15552 profile cylinder would not clear.
Sample lift in a lab automation module
With about 8 kg of vertical lift capacity at a 2:1 margin, the 20 mm bore raises small vials or trays, and the 30-500 mm/s speed band matches pick-and-place cycles.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30B the Right Cylinder?
At 157.1 N push (0.5 MPa) this 20 mm bore suits light clamping and small-part transfer; step down to a 16 mm bore (100.5 N) for lighter loads or up to a 25 mm bore (245.4 N) when the job needs more margin. Choose the -30 window only if the trimmed stroke range of 45-75 mm matches your fixture, and remember the stop screw shortens the extend stroke rather than lengthening it. FA flange or LB foot mounts bolt to the ISO 21287 face, and if position feedback matters later, order the -S variant so CMSE / DMSE switches work.
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 ACEJ20X75-30B FAQ
Push is 157.1 N and pull 117.8 N at 0.5 MPa; at 0.7 MPa push is 219.9 N and pull 164.9 N, with a theoretical maximum of 32 kgf at 1.0 MPa. It is double acting with a 75 mm stroke adjustable down to 45 mm via the -30 stop screw, runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), temperature -20 to +70 C, speed 30-500 mm/s, port M5x0.8, rod 10 mm with male thread, and a fixed TPU bumper at both ends.
An external stop screw shortens the extend stroke by up to 30 mm within the ordered window, so the effective range is 45-75 mm; it is a mechanical end stop, not a mid-stroke lock, so the rod still drifts if air is lost. Sensors need the optional -S magnet code, which this model does not carry, so no CMSE or DMSE switch can be mounted on this unit. Mounting uses the standard ISO 21287 face with FA flange or LB foot options.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-30B
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.