Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-50SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-50SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 75mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke75 mm
- Port sizeM5×0.8
- Adjuster threadM8×1.25
- 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 ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-50SB
The AirTAC ACQJ20X75-50SB is a double-acting JIS compact cylinder with an external threaded stop and lock nut that limits the extend end position. You can fine-tune the usable extend range from 25 mm up to the full 75 mm directly on your machinery, while the retract stroke remains completely unaffected. Because the piston area stays the same, output force is identical to a standard ACQ of this bore.
This bore 20 unit features a 10 mm piston rod, an M5x0.8 port, and a male M8x1.25 rod end thread (-B) for direct load coupling. It includes a piston magnet (-S) compatible with reed or solid-state switches, and relies on a fixed elastomer bumper at each end for end-of-stroke deceleration.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-50SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-50SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 75 mm |
| Adjuster thread | M8×1.25 |
| Port size | M5×0.8 |
| 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 |
| Rod thread | M5×0.8 (F) / M8×1.25 (B) |
Specifications follow the official AirTAC ACQJ datasheet. The adjustable stop shortens the EXTEND stroke only; the piston area — and therefore the force — is the same as a standard ACQ of this bore. Adjustable window options: 10/20/30/40/50/75/100 mm.
Theoretical Output Force (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 118 N |
| 0.7 MPa | 220 N | — |
| Max (@1.0 MPa) | 32 kgf | |
Force equals a standard ACQ of the same bore — the adjuster changes stroke length, not piston area. Actual usable force is lower due to friction; size with a safety margin.
Model Code: Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-50SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×75 | Full stroke length in mm. |
| -0 | Adjustable window in mm (extend stroke can be shortened by up to this). |
| S / B | Magnet (S) / male-thread rod (B); omit for none / female thread. |
Thread: PT standard (G / NPT available). Related: ACQ (fixed stroke), ACQD (double rod), TACQ (guided / non-rotating).
Where the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-50SB Is Used
Machining Fixture Positioning
Dial in the exact clamping reach on a CNC milling fixture. The external stop allows operators to shift the extend endpoint by up to 50 mm during setup without machining new spacer blocks.
Packaging Line Product Diversion
Adjust the stroke of a sorting gate on the fly when carton sizes change. The lock nut secures the new extend position so the gate reliably deflects varying box widths.
Electronic Assembly Testing
Find the optimal contact depth for a PCB pressing station. Engineers can run trial end positions between 25 and 75 mm to prevent damaging delicate components before locking the final setting.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-50SB the Right Cylinder?
If you do not need to vary the end position, a fixed-stroke ACQ20X75 will deliver the same performance. When sizing, dropping down to a bore 12 unit yields 56.5 N push at 0.5 MPa, whereas stepping up to a bore 25 model provides 245.4 N. This ACQJ20X75-50SB provides 157.1 N push and 117.8 N pull at 0.5 MPa. Confirm your ordering essentials: 20 mm bore, 75 mm full stroke, 50 mm adjuster window, male rod thread, and the magnet option.
Quick checklist
- ✓ Need on-machine end-position tuning?
- ✓ Full stroke and adjust window (mm)
- ✓ Force at your working pressure
- ✓ Magnet (S) for sensors?
- ✓ Female (blank) or male (B) rod thread
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Lock the adjuster nut after setting the stop.
- check The stop limits the EXTEND stroke only.
- check Avoid side load on the short piston rod.
- check Installation by qualified personnel per AirTAC docs.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X75-50SB FAQ
The usable extend range is 25-75 mm (75 mm full stroke minus the 50 mm window). Force is identical to a standard ACQ: 157.1 N push and 117.8 N pull at 0.5 MPa, 219.9 N push at 0.7 MPa, and a maximum push of 32 kgf at 1.0 MPa. The M8x1.25 adjuster changes stroke length only, not the piston area.
It uses fixed elastomer bumpers at both ends for deceleration, not adjustable air cushions. The built-in magnet (-S) works with reed or electronic solid-state switches. Note that a plain compact cylinder does not hold its load on air loss; for a fail-safe hold, install an external rod lock or pilot-operated check valve.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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