Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-50S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-50S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 125mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke125 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-50S
The AirTAC ACQJ125X125-50S is a double-acting, single-rod JIS compact cylinder featuring a big 125mm bore and an external extend-stroke adjuster. A threaded stop with a lock nut on the rod-end side limits how far the rod extends, allowing you to fine-tune the end position on the machine without swapping parts. The usable extend range is 75-125mm (the 125mm full stroke minus up to a 50mm window), while the retract stroke remains unaffected. Because the piston area stays the same, output force is identical to a standard ACQ of this bore.
This large-bore compact unit delivers 6135.9N push and 5733.8N pull force at 0.5MPa, rising to 8590.3N push at 0.7MPa, with a maximum push capacity of 1251kgf at 1.0MPa. It includes a 32mm piston rod, a female M22x2.5 rod-end thread, and a PT3/8 port. The -S suffix means a piston magnet is built in for position sensing with reed or solid-state switches. Instead of adjustable air cushions, fixed NBR elastomer bumpers decelerate the load at stroke ends.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-50S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-50S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 125 mm |
| Adjuster thread | M27×2.0 |
| Port size | PT3/8 |
| 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 | M22×2.5 (F) / M30×1.5 (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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 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 ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-50S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×125 | 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 ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-50S Is Used
Heavy Press Tonnage Setup
Dial in the exact extend end position during heavy press setup, using the external M27x2.0 stop to vary the stroke between 75 and 125mm for different material thicknesses.
Large Fixture Changeover
Adapt large automated welding fixtures for new product runs by turning the threaded stop to reposition the clamping endpoint without machining new spacers.
Stamping Trial Positions
Test trial end positions on a stamping line by adjusting the extend stroke in the 50mm window, finding the optimal forming depth before locking the nut.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-50S the Right Cylinder?
When sizing this 125mm bore unit, dropping down to a 100mm bore yields 3927.0N push at 0.5MPa, whereas stepping up to a 140mm bore provides 7696.9N push at 0.5MPa. If your application requires a fixed extend length without any on-machine tuning, a standard ACQ cylinder will suffice. To order, confirm the 125mm bore, 125mm full stroke, 50mm adjustment window, the -S magnet option, and the default female M22x2.5 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 ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-50S FAQ
It provides 6135.9N push and 5733.8N pull at 0.5MPa, 8590.3N push at 0.7MPa, and a maximum push of 1251kgf at 1.0MPa. The full stroke is 125mm, but the external adjuster allows the usable extend range to be shortened anywhere from 75mm up to 125mm.
No, the adjuster only changes the extend stroke length, not the piston area, so force remains identical to a standard ACQ. Deceleration is handled by fixed NBR elastomer bumpers at each end, not adjustable air cushions. For high-energy loads, use an external shock absorber.
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