Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-75SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-75SB 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 ACQJ125X125-75SB
The AirTAC ACQJ125X125-75SB is a double-acting, big-bore JIS compact cylinder with a 125 mm stroke and an external extend stop. A threaded rod with a lock nut lets you shorten the forward stroke by up to 75 mm, giving a usable extend range of 50 to 125 mm. The return stroke remains at the full 125 mm. Because the piston area is unchanged, the output force is identical to a standard ACQ of this bore.
This SB option variant includes a built-in piston magnet for use with reed or solid-state electronic switches, and a male M30x1.5 piston rod end that couples directly to your load. The cylinder body uses a fixed NBR elastomer bumper at each end for end-of-stroke deceleration rather than an adjustable air cushion. With a 32 mm rod and PT3/8 port, it delivers 6135.9 N push force at 0.5 MPa and reaches a maximum push of 1251 kgf at 1.0 MPa.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-75SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-75SB |
|---|---|
| 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 ACQJ125X125-75SB
| 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 ACQJ125X125-75SB Is Used
Press Tonnage Setup
Dial in the exact 50 to 125 mm extend position on a heavy-duty press without machining new spacers, allowing rapid tonnage adjustments during product changeovers.
Large Assembly Jigs
Adapt clamping depth on the fly for oversized automotive assembly jigs, using the external M27x2.0 stop to accommodate varying part heights.
Metal Forming Stops
Tune the stroke end position on heavy metal bending equipment to test trial bend depths before finalizing the tooling setup.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-75SB the Right Cylinder?
This 125 mm bore generates 6135.9 N push force at 0.5 MPa, sitting between the smaller 100 mm bore (3927.0 N) and the larger 140 mm bore (7696.9 N). Choose this model when your application needs high force alongside variable end positioning; if the extend position never changes, a fixed-stroke ACQ cylinder is sufficient. To order, confirm the 125 mm bore, 125 mm full stroke, 75 mm adjustment window, the S magnet option, 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 ACQJ125~160 Adjustable Compact Cylinder ACQJ125X125-75SB FAQ
It delivers 6135.9 N push and 5733.8 N pull force at 0.5 MPa, 8590.3 N push at 0.7 MPa, and a maximum push of 1251 kgf at 1.0 MPa. The full stroke is 125 mm, and the external stop provides an adjustable extend range of 50 to 125 mm.
An external threaded stop with a lock nut limits the extend stroke length, but it does not change the piston area, so the force remains identical to a standard ACQ. The retract stroke is unaffected. The cylinder uses fixed NBR bumpers for deceleration, and the built-in -S magnet works with reed or solid-state electronic switches.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Related AirTAC ACQJ Compact Cylinders
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