Description
ASTLDC500.10.8 Hydraulic Cylinder
40mm Bore ?? 25mm Rod ?? 385mm Stroke
The ASTLDC500.10.8 cylinder features a seamless steel construction with a 40mm precision-honed bore and a 25mm rod finished to Ra 0.4??m. Its 385mm stroke capacity makes it the ideal replacement for aging OEM steering actuators.
ASTLDC500.10.8
40 mm
25 mm
385 mm
388 mm
Choose Ever-power custom hydraulic cylinders for ISO-certified production and comprehensive engineering.
Product Overview
The ASTLDC500.10.8 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.
This demonstrates why Ever-power is preferred for hydraulic cylinder manufacturer among fleet operators.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | ASTLDC500.10.8 |
| Bore Dia | 40.0 mm |
| Rod Dia | 25.0 mm |
| Stroke | 385.0 mm |
| Mounting | 388.0 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 ASTLDC500.10.8 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 385mm range. The orbitrol valve provides proportional response ?? small wheel movements produce small displacements.
Applications
In forklift steering, the ASTLDC500.10.8 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
Engineered for interchangeability, this unit matches mounting envelope, port geometry, and force characteristics of factory cylinders on Mitsubishi material handling equipment. Pin-eye and clevis dimensions conform to OEM specifications used by TCM and Heli, allowing direct bolt-on replacement without adapters or bracket modifications. Aftermarket distributors stock this as a universal solution for Hangcha forklift families commonly found in rental and leasing fleets requiring rapid turnaround.
Visit our single acting hydraulic cylinder page for documentation and troubleshooting guides.
Customization Options
Ever-power’s program addresses that no two OEM installations are identical. Whether non-standard 40mm bore, specialized rod end, or alternative sealing, our engineers develop cost-effective solutions.
Material
Stainless barrel for corrosion, alloy upgrades for 25mm rod.
Surface
Nickel-chrome duplex, ceramic, phosphate, marine paint.
Temp
Low-temp NBR to -40??C, Viton to +150??C.
Testing
Extended cycling, salt spray, custom acceptance criteria.
Manufacturing & Quality
Lean workflow through machining, finishing, assembly, test. Seamless tubing CNC-turned. Diamond abrasives achieve cross-hatch on 40mm bore. Rods centerless ground, chrome-plated, eddy-current inspected. Torque-monitored assembly. Static hold, dynamic cycling, over-pressure verification.
Steel In
27SiMn, 520MPa cert
Turning
40mm bore, H8 finish
Surface
Hard chrome, 20??m+
Build
Seals, PTFE bands
Verify
Pressure, zero leak
Measure
CMM all critical dims
How to Select the Right Hydraulic Cylinder
Selecting a replacement cylinder involves evaluation of multiple interdependent parameters. Use this framework to confirm the 40mm ?? 25mm ?? 385mm unit with 388mm mounting suits your equipment. Each parameter affects performance, installation compatibility, and service life in your specific operating environment.
- Check Mounting Dimensions
Center-to-center between pins must match 388mm ??2mm. Verify pin diameter compatibility. Check hose and fitting clearance at full extension without interference. - Pressure Compatibility
Confirm system operates at ??25 MPa with this 40mm bore. Verify pump flow produces acceptable extension/retraction speed for your steering response requirements. - Specify Seal Material
Standard NBR suits mineral oil at -30??C to +100??C. Select Viton for synthetic fluids or temps above 100??C. Specify PU for water-glycol mixtures at order time.
Structural Components
The 40mm barrel is the largest structural element, thick-wall seamless steel containing 25 MPa with 4:1 safety factor. The cap-end houses the inlet port and rear mounting ?? pin-eye or clevis lug machined integrally. The piston incorporates seal grooves and wear bands centering it within the 40mm bore. The 25mm rod resists axial tension and compression; hard chrome seals against the gland and withstands environmental exposure. The threaded rod gland integrates sealing, bearing, and retention in a replaceable cartridge.
Piston Rod
25mm hard chrome plated, HV??900, Ra 0.4??m
Piston
Ductile iron with PTFE wear bands
Gland
Threaded cartridge: seal, bearing, retention
End Caps
Steel forgings, CNC-machined, ported
Ever-power Technical Deep Dive
Seal Architecture
The triple-barrier in this 40mm bore addresses contamination, pressure loss, and extrusion. The PTFE-bronze wiper removes 50??m particles while maintaining 2??m oil film on the 25mm rod. The PU U-cup creates a self-energizing seal that improves with pressure.
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 ~48.0L 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 ASTLDC500.10.8 for side-by-side comparison. The 40mm bore ?? 25mm rod geometry is validated across thousands of installations.
Ever-power Hydraulics | ISO Certified | Export Worldwide | Ref: ASTLDC500.10.8
