Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-50SB
The AirTAC Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-50SB 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 ACEJ20X75-50SB
The ACEJ20X75-50SB is a double acting ISO 21287 compact cylinder with an adjustable extend stroke. Air drives the rod out and pulls it back, and an external stop screw trims the 75 mm stroke down by up to 50 mm, giving a usable range of 25-75 mm without swapping the cylinder. At 0.5 MPa this 20 mm bore pushes 157.1 N and pulls 117.8 N, rising to 219.9 N on push at 0.7 MPa. The short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight jigs and guarding where a full-length body cannot go.
In practice, plan on roughly 94 N of real work at 0.5 MPa (about 60% of the rated push), which is the equivalent of lifting around 8 kg vertically with a 2:1 margin. The hard-anodized aluminium body carries a hard-chrome plated S45C rod with a male thread, fixed TPU bumpers absorb end-of-stroke energy at both ends, and because this model carries the optional -S magnet, CMSE / DMSE switches can be mounted for end-of-stroke sensing. Speed range is 30-500 mm/s.
Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-50SB Technical Specifications
| Model | Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-50SB |
|---|---|
| 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 ACEJ20X75-50SB
| 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 ACEJ20X75-50SB Is Used
Jig clamping on CNC fixtures
The 25-75 mm trim range lets one cylinder serve several fixture heights; 157.1 N push at 0.5 MPa clamps small aluminium or plastic workpieces reliably.
Packaging line reject pusher
Compact body fits under low conveyor guarding, and the fitted magnet with a DMSE switch confirms the pusher has fully retracted before the next carton arrives.
Lab sample press station
About 94 N of usable force at 0.5 MPa presses vials and test coupons gently, while the male rod thread accepts custom pressing tips directly.
Is the Airtac ACEJ12 Adjustable Compact Cylinder ACEJ20X75-50SB the Right Cylinder?
Size check: a 16 mm bore gives 100.5 N push at 0.5 MPa, so step up to this 20 mm bore when you need the 157.1 N class; a 25 mm bore reaches 245.4 N if your load grows. Remember the stop screw is a mechanical end stop for the extend stroke, not a mid-stroke lock, so the rod will still drift if air is lost. Mount with FA flange or LB foot hardware on the ISO 21287 face, and order CMSE or DMSE switches to pair with the fitted -S magnet.
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 ACEJ20X75-50SB 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. Theoretical maximum is 32 kgf at 1.0 MPa. The ordered stroke is 75 mm and the -50 stop screw trims the extend stroke anywhere in a 25-75 mm window. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), speed 30-500 mm/s, port M5x0.8, rod 10 mm with male thread.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, and FA flange or LB foot brackets bolt straight to the standard face. This model carries the optional -S magnet, so CMSE / DMSE reed or solid-state switches mount in the body slots for end-of-stroke detection. Fixed TPU bumpers at both ends absorb end-of-stroke impact.
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