Multi-Hole Designed Base Valve

The Smooth Edge Finish Multi-Hole Designed Base Valve from XIAYI is developed with a strong focus on manufacturing consistency and precision component control. Its powder metallurgy structure is produced through controlled pressing, sintering, sizing and finishing processes, while critical dimensions and material characteristics are checked throughout production.

Consistency Starts with Material Control

Powder metallurgy components depend heavily on the consistency of the raw material mixture. Variations in powder composition can affect density, hardness, dimensional stability and the final mechanical behavior of the finished component.

XIAYI uses FC-0208 iron-copper powder metallurgy material for this application. In the supplied production data, the tested composition includes 0.67% carbon, 1.57% copper and 97.76% iron. The measured density reaches 6.66--6.68 g/cm³, while hardness is maintained at 80--82 HRB.

These parameters provide a controlled material foundation for subsequent pressing and sintering operations. Batch-level material testing also allows production personnel to identify abnormal composition before the material enters the main manufacturing process.

Precision Forming for Repeatable Geometry

Multi-hole components require accurate forming because variations in hole position, outer diameter or overall height can create difficulties during downstream assembly.

During precision pressing, XIAYI controls forming weight, density and production speed to maintain repeatable geometry. The target density is controlled within the specified process range, with a component weight of approximately 19 g and a forming stroke rate of 10--12 times per minute.

First-piece inspection and regular patrol checks are used to identify deviations at an early stage rather than waiting until the entire batch has been completed.

This production philosophy is particularly useful for buyers who require thousands of components with consistent dimensions rather than small quantities of individually adjusted parts.

Dimensional Matching for OEM Assembly

The Smooth Edge Finish Multi-Hole Designed Base Valve includes several critical dimensions that require controlled machining and sizing. Typical reference dimensions include φ28, φ3.1 and a height of 10.5±0.15 mm.

The sizing process is used to refine the formed component and maintain the required dimensional relationship between different functional surfaces. Surface height difference is controlled to ≤0.04 mm, while unspecified dimensional tolerances are maintained at ±0.10 mm according to the production specification.

For shock absorber manufacturers, dimensional consistency can be more important than simply achieving a single qualified sample. A stable dimensional range helps reduce manual adjustment, fitting problems and unexpected differences between production lots.

Smooth Finishing as a Manufacturing Quality Step

In this product, surface finishing is treated as part of the overall quality-control process rather than simply an appearance treatment.

The Smooth Edge Finish Multi-Hole Designed Base Valve passes through ultrasonic cleaning and dedicated finishing equipment to remove residual powder and unwanted sharp edges. The finishing process covers the external edge areas as well as the multi-hole regions.

Finished parts are subsequently subjected to visual and dimensional checks. This combination helps control surface condition before the components are packed and delivered to customers.

For automated or semi-automated shock absorber assembly, maintaining a predictable component surface condition can help reduce unexpected interference during feeding and installation.

Four-Stage Production Control

XIAYI organizes production around four interconnected manufacturing stages: precision pressing, high-temperature sintering, precision sizing, and finishing with final inspection.

During sintering, the furnace operates at approximately 1080--1110°C under an H₂+N₂ atmosphere, with belt speed controlled around 145--150 mm/min. Production parameters are recorded hourly, while batch samples are retained for process verification.

After sintering, precision sizing corrects key dimensional characteristics. The final stage focuses on edge condition, dimensional accuracy and appearance, with 100% full-size inspection specified for finished production.

This closed-loop process makes it easier to trace potential quality deviations back to the relevant production stage.

Measurement Capability for Precision Components

For international OEM buyers, reliable measurement capability is an important part of supplier evaluation. XIAYI uses different inspection systems according to the characteristic being measured.

A ZEISS CMM is used for geometric tolerance and multi-hole positional accuracy. A White Light Interferometer TMS500 is used to evaluate flatness and height differences. A high-definition profile tester supports inspection of hole and edge conditions, while Rockwell hardness equipment verifies material hardness.

Vision measuring equipment is also available for full-size dimensional inspection, with a stated measurement accuracy of 0.001 mm.

The combination of different inspection technologies allows critical dimensions, geometric relationships, surface characteristics and material hardness to be evaluated separately rather than relying on a single inspection method.

Production Traceability for Bulk Orders

Large-volume component purchasing requires more than an initial sample approval. Buyers need confidence that production parts remain consistent after the order moves into mass production.

XIAYI records key process parameters and inspection results during production. Raw material testing, pressing inspection, sintering records, sizing checks and final inspection form a traceable production chain.

This approach is especially valuable for automotive and motorcycle component buyers who need to investigate quality issues quickly and identify the relevant production batch when necessary.

Real Application Case

A well-known European high-end motorcycle shock absorber brand had experienced recurring quality problems with its existing base valves. The customer reported abnormal noise and unstable damping performance, while sharp edges on the conventional components could damage sealing parts during manual assembly.

The assembly defective rate had reached 2.3%, and the after-sales failure rate was approximately 1.6%.

After switching to the Smooth Edge Finish Multi-Hole Designed Base Valve, the customer benefited from improved dimensional consistency and controlled surface quality during assembly. The components completed 80,000 reciprocating fatigue tests and 240-hour salt spray durability tests without observed oil passage blockage, significant wear or oil leakage.

Following production implementation, the assembly defective rate decreased to below 0.3%, while the after-sales failure rate fell to 0.06%.

The customer subsequently established a long-term supply relationship with XIAYI, with an annual demand of approximately 150,000 units.

OEM and ODM Manufacturing

Different shock absorber platforms may use different component dimensions, hole configurations and fitting requirements. XIAYI provides OEM and ODM production based on customer drawings, samples and technical specifications.

The production team can adjust critical dimensions, hole quantity, hole diameter, hole position, material requirements and surface finishing specifications according to the customer's assembly system.

Before mass production, technical parameters can be verified through sample development and dimensional inspection. Once approved, the same process parameters and inspection requirements can be applied to subsequent production batches to improve repeatability.

Frequently Asked Questions

How does XIAYI control batch-to-batch consistency?

XIAYI controls raw material composition, pressing parameters, sintering conditions, sizing dimensions and final inspection requirements. Key production parameters are recorded throughout the manufacturing process to support batch traceability.

What are the main dimensions available?

Typical reference dimensions include φ28, φ3.1 and 10.5±0.15 mm height. The exact specification can be produced according to the customer's drawing or sample.

Can XIAYI manufacture according to customer drawings?

Yes. OEM and ODM production is available. Customers can provide drawings, samples or technical specifications for dimensional and process evaluation before mass production.

What material is used for the component?

The standard material is FC-0208 iron-copper powder metallurgy material. Material composition, density and hardness are controlled during production.

How are finished parts inspected?

Inspection may include CMM measurement, vision measurement, profile inspection, flatness measurement, hardness testing and visual inspection according to the required characteristics.

Application and XIAYI Manufacturing Capability

The Smooth Edge Finish Multi-Hole Designed Base Valve can be supplied for automotive, motorcycle, commercial vehicle and new energy vehicle shock absorber applications.

XIAYI combines powder metallurgy manufacturing, precision sizing, finishing and multi-dimensional inspection within a standardized production environment. With a 5,000-square-meter facility, more than 20 years of export experience and a quality management system conforming to IATF 16949:2016, XIAYI provides precision base valve components for OEM customers requiring stable specifications, controlled production and dependable large-volume supply.