Description
nan Hydraulic Cylinder
40mm Bore ?? 25mm Rod ?? 140mm Stroke
The nan cylinder features a seamless steel construction with a 40mm precision-honed bore and a 25mm rod finished to Ra 0.4??m. Its 140mm stroke capacity makes it the ideal replacement for aging OEM steering actuators.
nan
40 mm
25 mm
140 mm
350 mm
Choose Ever-power custom hydraulic cylinders for ISO-certified production and comprehensive engineering.
Product Overview
The nan is designed for rebuildability. When the 40mm bore shows wear, re-hone to next oversize with new seal kit. The 25mm rod can be re-chromed. Wear parts are available as spares reducing lifetime cost by up to 60%. The balanced 40mm/25mm geometry optimizes extend/retract force differentials.
For extreme environment applications ?? whether arctic cold stores, tropical humidity, or dusty construction sites ?? Ever-power offers specialized surface treatments and seal compounds that extend service life beyond standard configurations by up to 200% in accelerated life testing.
Key Features
Corrosion Protection
The barrel receives zinc-phosphate conversion coating prior to painting for enhanced adhesion and corrosion resistance. The 25mm rod chrome plating passes 96-hour neutral salt spray testing per ASTM B117, ensuring reliable outdoor performance in marine and chemically aggressive environments.
Flexible Porting Options
BSPP, NPT, or metric port threads are available in side, rear, or flange mounting orientations. This flexibility allows direct connection to existing hydraulic plumbing without adapter fittings, custom hose configurations, or line routing modifications.
Custom Rod End Fittings
Male and female threads, spherical bearings, clevis forks, or special end fittings are fabricated to customer dimensional drawings and validated load requirements. Custom configurations ship within 10-15 business days from drawing approval.
Export-Grade Packaging
VCI corrosion protection film, silica gel desiccant, and ISPM-15 certified plywood crating ensure damage-free international delivery. Packaging withstands ocean transit periods up to 45 days and multiple handling transitions through port and customs facilities.
Ever-power hydraulic cylinder manufacturer expertise reduces downtime for demanding industrial applications.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | nan |
| Bore Dia | 40.0 mm |
| Rod Dia | 25.0 mm |
| Stroke | 140.0 mm |
| Mounting | 350.0 mm |
| Max Pressure | 25 MPa |
| Hydro Test | 37.5 MPa |
| Burst Min | 62.5+ MPa |
| Operating Temp | -30??C to +100??C |
| Medium | Mineral Oil |
| Tube Material | 27SiMn Seamless |
| Chrome Layer | Hard Chrome 20+??m |
| Fixing Type | Pin Eye / Clevis |
| Port Size | G1/4 or M14x1.5 |
Working Principle
At system level, the nan is one component in a hydrostatic loop. The priority divider diverts pump output to the cylinder circuit. Oil enters the 40mm barrel pushing the piston sealed by polymer rings. The 25mm rod extends through the gland, its chrome surface preventing leakage across 140mm range. The orbitrol valve provides proportional response ?? small wheel movements produce small displacements.
Applications
In forklift steering, the nan replaces OEM cylinders on 1.5-ton to 5-ton capacity classes. The 40mm bore matches standard steering pump output ensuring compatible flow and pressure. Cold storage facilities value low-temperature seal performance where conventional units harden and leak. Port operations deploy this on reach stackers and straddle carriers where steering reliability directly impacts container throughput and vessel turnaround times.
Brand Compatibility
OEM-grade specifications ensure seamless integration with Crown hydraulic systems at standard flow and pressure parameters. Rod end threads and gland dimensions match original components on Clark and Doosan steer axles, eliminating adapter fittings. Technical datasheets with full dimensional drawings are available for engineering verification and BOM approval before purchase commitment.
Learn about hydraulic optimization in our single acting hydraulic cylinder article.
Customization Options
For volume OEMs, Ever-power provides dedicated engineering to adapt this platform. Development includes 3D modeling, FEA analysis, prototype production, and validation testing.
Mounts
Custom brackets, valve manifolds, dual-eye configs.
Speed
Built-in cushions, meter-out orifices, flow controls.
Sensors
Magnetic piston for reed switch or Hall effect.
Coding
OEM paint colors, laser marking for 40mm bore cylinders.
Manufacturing & Quality
ISO 9001 facility with SPC monitoring. Twin-spindle CNC machines both end bores for 0.05mm concentricity. Chrome verified at 8 points by XRF (20??m min). Positive-pressure assembly. Final test to 37.5 MPa with joint inspection.
Receipt
Mill test reports
Machining
CNC, twin-spindle
Surface
XRF chrome check
Clean Asm
Positive air pressure
Hydrotest
37.5 MPa gradual
Final QC
Dimensional, visual
How to Select the Right Hydraulic Cylinder
The selection process balances hydraulic system capability with mechanical constraints. Verify these parameters against equipment specs ?? bore 40mm, rod 25mm, stroke 140mm, mounting 350mm ?? considering duty cycle, fluid type, temperature range, and contamination exposure in your application.
- Calculate Forces
Extension: 25N. Retraction: 15N at 20 MPa. Verify these exceed application loads including safety margins for peak conditions. - Check Envelope Dimensions
Mounting 350mm, retracted 210mm, extended 350mm ?? verify against equipment clearances. Rod end must mate with steering linkage without modification. - Evaluate Environment
Temperature range, fluid type, duty cycle, contamination exposure determine seal selection and surface treatment for this 40mm bore cylinder in your specific conditions.
Structural Components
The 40mm barrel serves as pressure vessel and bearing housing ?? honed Ra 0.4??m eliminates separate liner need. End caps provide porting, mounting, and seal retention; torqued with anaerobic sealant against vibration loosening. The floating piston carries the polyurethane U-cup and two bronze-filled PTFE guide bands distributing side loads. The 25mm chrome rod exits through the head-end gland where triple-seal arrangement maintains zero leakage. Vent holes prevent pressure trapping behind the rod seal.
Piston
Ductile iron with PTFE wear bands
Gland
Threaded cartridge: seal, bearing, retention
End Caps
Steel forgings, CNC-machined, ported
Seal System
Multi-lip PU/NBR, self-energizing
Ever-power Technical Deep Dive
Global Markets
Ever-power distributes 40mm bore cylinders through 35 distributors in 42 countries with warehouses in Rotterdam, Dubai, Singapore, and Chicago. A remanufacturing program at 40% of new cost supports circular economy goals with identical warranty coverage.
Frequently Asked Questions
Sub-zero operation?
Standard NBR to -30??C. LT-NBR for -30??C to -40??C. Silicone/HNBR below -40??C. Barrel stays ductile to -50??C. Warm up system before full demand.
Prevent rod corrosion outdoors?
Specify nickel-chrome duplex (96hr salt spray), ceramic coating (500+ hr), or rod boot. Apply corrosion inhibitor for stationary periods.
Port size for 40mm bore?
Standard G1/4 BSPP or M14??1.5. Requires ~17.0L per cycle. At 10-20 L/min pump flow, extension is 1-2 seconds. G3/8 or SAE-6 for higher flow.
Repairable or disposable?
Fully repairable ?? threaded construction allows disassembly for re-honing, re-chroming, seal replacement. Rebuild kits at 30-40% of new. Factory reman available with 12-month warranty.
Get Your Quote Today
Request a sample nan for side-by-side comparison. The 40mm bore ?? 25mm rod geometry is validated across thousands of installations.
Ever-power Cylinder Co. | Quality Assured | Ships Globally | nan
