Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-50B
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-50B 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 ACEJ20X75-50B
The ACEJ20X75-50B is a double acting ISO 21287 compact cylinder with an adjustable extend stroke. Its 20 mm bore delivers 157.1 N push and 117.8 N pull at 0.5 MPa (219.9 N push at 0.7 MPa), with a theoretical peak of 32 kgf at 1.0 MPa. The -50 code adds a 50 mm adjustment window: an external stop screw trims the extend stroke anywhere from 25 mm up to the full 75 mm, so one cylinder covers several station depths. The B code gives a male rod thread, and the port is M5x0.8.
The short ISO 21287 body saves about 50% of the mounting length of an ISO 15552 profile cylinder, which matters in slim fixtures and guarded cells. A hard-anodized aluminium body runs on an S45C hard-chrome rod, with a fixed TPU bumper at each end to soften arrival. In practice, plan on roughly 94 N of usable push at 0.5 MPa, which lifts about 8 kg vertically with a 2:1 margin. Speed range is 30-500 mm/s and pressure 0.15-1.0 MPa (22-145 psi).
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-50B Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-50B |
|---|---|
| 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 ACEJ20X75-50B
| ACEJ | ISO 21287 compact cylinder (adjustable-stroke). |
|---|---|
| 20 | Bore size in mm. |
| ×75 | Stroke length in mm. |
| -50 | 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 ACEJ20X75-50B Is Used
Small-part press fitting
Presses bearings or bushings into housings on electronics assembly benches, where the 25-75 mm trim range matches varied part heights without changing cylinders.
Fixture clamping on CNC pallets
Clamps thin-walled aluminium workpieces in machining jigs; the short body fits inside fixture walls where a full-length profile cylinder cannot.
Lab sample indexing
Advances sample trays in compact test rigs, with the male rod thread simplifying tooling attachment and the TPU bumper quieting each arrival.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-50B the Right Cylinder?
At 157.1 N push at 0.5 MPa, this bore sits between the 16 mm (100.5 N) and 25 mm (245.4 N) sizes: step down when the load is light and space is tight, step up for heavier clamping. Note the adjuster is a mechanical end stop for the extend stroke only, not a mid-stroke lock, so the rod can drift if air is lost. Mounting bolts straight onto the ISO 21287 face with FA flange or LB foot options plus I/Y rod knuckles. This version has no magnet; order the -S code if you later need CMSE or DMSE switch positioning.
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 ACEJ20X75-50B FAQ
At 0.5 MPa it pushes 157.1 N and pulls 117.8 N; at 0.7 MPa push rises to 219.9 N, with a theoretical maximum of 32 kgf at 1.0 MPa. The -50 code means an external stop screw can shorten the 75 mm extend stroke by up to 50 mm, giving a usable range of 25-75 mm. It is double acting, runs at 30-500 mm/s, and uses an M5x0.8 port with a male rod thread.
It is an ISO 21287 compact cylinder whose short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it suits tight jigs and guards. A fixed TPU bumper at each end absorbs end-of-stroke shock. FA flange and LB foot mountings bolt to the standard face. Sensing needs the optional -S magnet ordered with the cylinder; this model has no magnet, so no CMSE or DMSE switch can be mounted until you specify -S.
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 ACEJ20X75-50B
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.