Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-50SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-50SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 90mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke90 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 ACQJ20X90-50SB
The AirTAC ACQJ20X90-50SB is a double-acting JIS compact cylinder with an external extend-stop mechanism. A threaded screw and lock nut limit forward travel, letting you dial in the end position from 40 to 90 mm directly on the machine. The return stroke remains completely unaffected.
Because the piston area stays the same, output force equals a standard ACQ of this size. You get 157.1 N push at 0.5 MPa, with a 10 mm rod and M8x1.25 male thread. It includes a piston magnet for solid-state or reed sensors and fixed elastomer bumpers for end-of-stroke deceleration.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-50SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-50SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 90 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 ACQJ20X90-50SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×90 | 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 ACQJ20X90-50SB Is Used
CNC Fixture Clamping
Dial in the exact clamping depth for varying raw material thicknesses on a machining center without swapping cylinders.
Carton Forming Stops
Adjust the folding flap extension on the fly when switching between different box sizes on a packaging line.
Press Brake Gauging
Fine-tune the material back-stop position during trial bends to achieve precise metal angles before full production.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X90-50SB the Right Cylinder?
Choosing this 20 mm bore gives 157.1 N push and 117.8 N pull at 0.5 MPa. If you need less force, the 16 mm bore drops to 100.5 N push; stepping up to 25 mm yields 245.4 N. A fixed-stroke ACQ works if your end position never varies, but this adjustable unit saves time during product changeovers. Confirm your ordering needs: 90 mm full stroke, 50 mm adjust window, S magnet, and B male rod end.
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 ACQJ20X90-50SB FAQ
It delivers 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 full stroke is 90 mm, and with the 50 mm window, the usable extend range is 40 to 90 mm.
An M8x1.25 external screw with a lock nut limits forward travel, shortening the stroke without changing piston area, so force remains identical to a standard ACQ. Fixed elastomer bumpers decelerate the rod near the ends, but the cylinder will not hold a load on air loss; use an external rod lock for fail-safe holding.
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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