Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 50mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke50 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 ACQJ20X50-50SB
The AirTAC ACQJ20X50-50SB is a double-acting JIS compact cylinder with a 50mm full stroke and an external extend stop. A threaded screw and lock nut limit the rod extension, giving a usable extend range of 0-50mm. You tune the forward end position directly on the machine without swapping parts, while the retract stroke remains unaffected.
Because the piston area stays constant, output force is identical to a standard ACQ of this bore. The 20mm bore delivers 157.1N push and 117.8N pull at 0.5MPa. It includes a male M8x1.25 rod end (-B) for direct load coupling, a piston magnet (-S) for electronic or reed switches, and fixed elastomer bumpers. The adjuster itself uses an M8x1.25 thread.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 50 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 ACQJ20X50-50SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×50 | 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 ACQJ20X50-50SB Is Used
Machining Fixture Clamping
Dial in the exact clamping reach on a CNC fixture. The 0-50mm extend window lets operators accommodate different part heights without machining custom spacers.
Packaging Fold Adjustments
Set precise folding depths for varying carton sizes on a packaging line. The external stop allows quick changeovers while maintaining the full 117.8N pull force.
Assembly Press Positioning
Test and set trial end positions for pressing lightweight bearings. The male M8x1.25 rod threads directly to the press tool, and the lock nut secures the depth.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X50-50SB the Right Cylinder?
Choosing this 20mm bore provides 157.1N push at 0.5MPa. If you need less force, stepping down to a 16mm bore yields 100.5N push, whereas moving up to a 25mm bore provides 245.4N. Select this adjustable version if your application requires varying the extend endpoint; otherwise, a fixed-stroke ACQ cylinder is sufficient. Confirm your ordering needs: 20mm bore, 50mm full stroke, 50mm adjustment window, magnet (-S), and male rod thread (-B).
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 ACQJ20X50-50SB FAQ
It provides 157.1N push and 117.8N pull at 0.5MPa, 219.9N push at 0.7MPa, and a maximum push of 32kgf at 1.0MPa. The full stroke is 50mm, and with the 50mm adjustment window, the usable extend range is 0-50mm. The retract stroke is unaffected.
No, the adjuster changes only the extend stroke length, not the piston area, so force remains identical to a standard ACQ. Deceleration is handled by fixed elastomer bumpers at both ends, not an adjustable air cushion. For high-speed loads, use an external shock absorber.
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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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