Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-30
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-30 is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 300mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke300 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-30
The ACQJ40X300-30 is a double-acting, single-rod JIS compact cylinder built for applications requiring variable extend end positions. It features an external M12x1.25 threaded stop with a lock nut, allowing you to fine-tune the extend stroke from 270mm up to the full 300mm without swapping components. The retract stroke remains completely unaffected by this adjustment. As a long-stroke made-to-order variant, this 300mm unit exceeds the standard 100mm maximum for the bore 40 series.
Because the piston area is unchanged, output force matches a standard ACQ exactly, yielding 628.3N push and 527.8N pull at 0.5MPa. The unit incorporates a fixed NBR elastomer bumper at each end to decelerate the rod near travel limits, rather than relying on adjustable air cushions. The body includes sensor grooves, though this specific SKU ships without a magnet. With a 16mm rod diameter and PT1/8 porting, it operates efficiently between 30 and 500mm/s.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-30 Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-30 |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 300 mm |
| Adjuster thread | M12×1.25 |
| Port size | PT1/8 |
| 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 | M8×1.25 (F) / M14×1.5 (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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-30
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-30 Is Used
Machining Fixture Limits
Dial in the exact extend stop from 270 to 300mm on a CNC machining fixture to accommodate varying raw material lengths without fabricating new mechanical hard stops.
Carton Forming Adjustments
Tune the push end position on a packaging line carton erector, utilizing the 628.3N force to set precise folding breaks for different box dimensions on the fly.
Assembly Press Setup
Test and set trial end positions for pressing bearings on an assembly line, tweaking the 30mm window to find the optimal engagement depth before locking the nut.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-30 the Right Cylinder?
If 628.3N push at 0.5MPa is excessive, stepping down to a 32mm bore yields 402.1N, whereas a 50mm bore provides 981.8N for heavier loads. For fixed extend positions that never require on-machine tweaking, a standard ACQ40X300 will suffice and avoids the adjuster overhang. When ordering this adjustable variant, confirm the 40mm bore, 300mm full stroke, 30mm adjustment window, female M8x1.25 rod thread, and PT1/8 porting. Remember that a plain compact cylinder will not hold a load upon air loss; utilize an external rod lock or pilot-operated check valve if fail-safe positioning is required.
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 ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-30 FAQ
The cylinder provides 628.3N push and 527.8N pull at 0.5MPa, 879.6N push at 0.7MPa, and a maximum push of 128kgf at 1.0MPa. The full stroke is 300mm, but the external M12x1.25 adjuster allows you to shorten the extend stroke by up to 30mm, giving a usable extend range of 270-300mm. The retract stroke remains fixed at 300mm.
An external threaded stop with a lock nut mechanically limits how far the rod extends, allowing on-machine tuning without changing parts. Because the piston area is unchanged, the output force is identical to a standard ACQ. Deceleration is handled by fixed NBR elastomer bumpers at both ends, not adjustable air cushions; for high-energy loads, add an external shock absorber. This model lacks a magnet, though the body retains sensor grooves.
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Related AirTAC ACQJ Compact Cylinders
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