Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X100-50SB
The AirTAC Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X100-50SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø20mm bore and 100mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ20 mm
- Full stroke100 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 ACQJ20X100-50SB
The AirTAC ACQJ20X100-50SB is a double-acting JIS compact cylinder with a 20mm bore and 100mm full stroke. An external threaded stop with a lock nut limits the extend end position, providing a usable extend range of 50-100mm. The retract stroke remains unaffected. Because the piston area is unchanged, the output force is identical to a standard ACQ of this bore.
This unit includes a male M8x1.25 rod end (-B) that couples directly to the load, and a built-in piston magnet (-S) for AirTAC magnetic switches. It operates at 30-500mm/s and features a fixed elastomer bumper at each end. The standard port thread is M5x0.8.
Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X100-50SB Technical Specifications
| Model | Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X100-50SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Full stroke | 100 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 ACQJ20X100-50SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 20 | Bore size in mm. |
| ×100 | 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 ACQJ20X100-50SB Is Used
Fixture Positioning
Adjust the extend stop on the fly to accommodate varying part sizes in machining fixtures without swapping out cylinder hardware.
Product Changeover
Fine-tune the end position during assembly line product changeovers to set new push distances rapidly and accurately.
Trial End Positions
Dial in experimental extend endpoints on packaging equipment to test contact pressure before finalizing the mechanical setup.
Is the Airtac ACQJ12~25 Adjustable Compact Cylinder ACQJ20X100-50SB the Right Cylinder?
This 20mm bore unit provides 157.1N push and 117.8N pull at 0.5MPa. If you need less force, step down to the 16mm bore (100.5N push); for more power, step up to the 25mm bore (245.4N push). If your machine never requires end-position tuning, a fixed-stroke ACQ cylinder suffices. When ordering, confirm the 20mm bore, 100mm full stroke, 50mm adjustable window, the -S magnet, and the -B male 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 ACQJ20X100-50SB FAQ
The usable extend range is 50-100mm (100mm full stroke minus up to a 50mm window). Force equals a standard ACQ: push is 157.1N and pull is 117.8N at 0.5MPa, push is 219.9N at 0.7MPa, and max push is 32kgf at 1.0MPa.
The external M8x1.25 threaded stop and lock nut limits the extend stroke length only, meaning the output force remains unchanged. The cylinder uses fixed elastomer bumpers for end-of-stroke deceleration, and the -S magnet works with reed or 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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