Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-50SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-50SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 75mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke75 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-50SB
The ACQJ125X75-50SB is a double-acting JIS compact cylinder featuring a 125mm bore and a 75mm full stroke. An external M27x2.0 threaded stop with a lock nut limits the extend end position, providing a usable forward range of 25 to 75mm. You tune this travel directly on the machine without swapping parts. The retract stroke remains completely unaffected.
Because the piston area stays constant, output force equals a standard ACQ of this size. At 0.5MPa it pushes 6135.9N and pulls 5733.8N. This big-bore unit includes a male M30x1.5 rod end, a PT3/8 port, and a piston magnet for electronic or reed switches. Fixed NBR elastomer bumpers absorb impact at both ends.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-50SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-50SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 75 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 ACQJ125X75-50SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×75 | 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 ACQJ125X75-50SB Is Used
Heavy Press Tonnage Setup
Dial in the exact 25 to 75mm extend contact point on a heavy stamping press without machining new spacers for different material thicknesses.
Large Fixture Changeover
Adapt clamping depth rapidly on automotive machining lines when swapping large engine block fixtures, using the external lock nut to set the stop.
Injection Mold Trial
Test ejection forward limits on large plastic injection molds, fine-tuning the stroke window safely before finalizing the mechanical hard stop.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-50SB the Right Cylinder?
Select this 125mm bore actuator when your setup demands high thrust but exact forward positioning varies. It yields 6135.9N push at 0.5MPa; dropping to the 100mm bore reduces push to 3927.0N, while the 140mm bore raises it to 7696.9N. If your application never requires end-position adjustments, a fixed-stroke ACQ125 cylinder suffices. Verify your ordering essentials: 125mm bore, 75mm full stroke, 50mm adjuster window, S magnet, and 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 ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-50SB FAQ
This cylinder pushes 6135.9N and pulls 5733.8N at 0.5MPa, and pushes 8590.3N at 0.7MPa. Maximum push is 1251kgf at 1.0MPa. The full stroke is 75mm with a 50mm adjustment window, giving a usable extend range of 25 to 75mm.
The M27x2.0 external threaded stop mechanically limits the extend length without altering piston area, so force remains identical to a standard ACQ. Fixed NBR bumpers decelerate the rod near stroke ends. Note that a plain compact cylinder drifts on air loss; for fail-safe load holding, install an external rod lock or pilot-operated check valve.
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Related AirTAC ACQJ Compact Cylinders
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