Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-50S
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-50S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 70mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke70 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 ACQJ20X70-50S
The AirTAC ACQJ20X70-50S is a double-acting JIS compact cylinder with a 20mm bore and 70mm full stroke, equipped with a piston magnet (-S). An external M8x1.25 threaded stop and lock nut lets you fine-tune the extend end position on the machine, providing a usable forward range of 20 to 70mm. The retract stroke remains completely unaffected by this adjustment.
Because the piston area stays the same, output force is identical to a standard ACQ of this size. The design features a fixed elastomer bumper at each end for end-of-stroke deceleration and includes magnetic-switch grooves compatible with reed or solid-state sensors. It uses a 10mm rod with an M5x0.8 female thread and an M5x0.8 port.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-50S Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-50S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 70 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 ACQJ20X70-50S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×70 | 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 ACQJ20X70-50S Is Used
Product Changeover Stops
Quickly dial in the extend stroke from 20 to 70mm when switching between part families on a packaging line, avoiding the need to swap physical spacers.
Trial End Positions
Safely test and set exact clamping depth on a machining fixture by limiting the forward travel before committing to a fixed hard stop.
Setup-Varying Fixtures
Accommodate varying workpiece heights in automated assembly by tweaking the external lock nut to alter the final extend position on the fly.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X70-50S the Right Cylinder?
If you need slightly less push, the 16mm bore yields 100.5N at 0.5MPa, whereas stepping up to the 25mm bore provides 245.4N. A fixed-stroke ACQ is sufficient if your end position never varies, but this adjustable model saves time during product changeovers. When ordering, confirm the 20mm bore, 70mm base stroke, 50mm adjuster window, the -S magnet, and your required rod thread.
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 ACQJ20X70-50S FAQ
The usable extend range is 20-70mm (a 70mm full stroke shortened by up to a 50mm window). Force is identical to a standard ACQ: push is 157.1N and pull is 117.8N at 0.5MPa, push is 219.9N at 0.7MPa, and maximum push is 32kgf at 1.0MPa.
An external M8x1.25 threaded stop with a lock nut limits the forward travel without changing the piston area, so force remains unchanged. The cylinder uses fixed elastomer bumpers for deceleration rather than adjustable air cushions, and the -S magnet works with both reed and electronic solid-state switches.
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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