Top 10 Manufacturers Of Camshaft Repair Kit China 2026

On an air-braked commercial vehicle, the camshaft repair kit is the least glamorous line item on the purchase order and the one that most often causes a comeback. The kit itself is a small assembly of bearings, bushings, washers, collars, O-rings and grease nipples, but those components sit at the pivot point of the entire drum brake linkage. When a slack adjuster rotates the S-camshaft, the cam head spreads the brake shoes against the drum. Every one of those rotations loads the same bearing journals and thrust surfaces inside the kit. If the bushing clearance is wrong or the seal allows road grit into the bore, the shaft stops returning to its rest position and the brakes begin to drag.

For importers building a programme for the North American, European or Australian aftermarket, this matters commercially. A camshaft repair kit that fits and seals properly protects the far more expensive camshaft underneath it, and it protects the distributor from the warranty claims that follow a dragging brake. That is why experienced buyers treat this category the way they treat brake chambers or slack adjusters: they qualify the factory, not the price list.

This guide reviews ten Chinese manufacturers that genuinely build in this space. All ten operate their own production facilities, all ten hold verifiable registration as manufacturing entities, and all ten supply fleet, OEM or export channels rather than acting as pass-through traders. The profiles below focus on what a buyer actually needs to evaluate: process control, material discipline, dimensional accuracy and export capability.

The ten factories below are listed without ranking. Each one serves a different combination of OEM supply, domestic fleet demand and export distribution, so the right partner depends on your order profile, your target axle platforms and the documentation your market requires.

Hangzhou Bainuo Machinery Co., Ltd.

Hangzhou Bainuo Machinery Co., Ltd. is a specialist manufacturer of commercial vehicle air brake components based in the Huanghu Township area of Yuhang District, Hangzhou. The company has built its position on one narrow idea executed properly: keep the dimensional relationship between a brake camshaft and the hardware around it exactly where the original equipment specification puts it. The factory carries equipment for forging, machining, heat treatment and surface finishing, and it supports that with a dedicated inspection regime that runs from incoming material verification through to finished-part function checks.

The camshaft repair kit programme reflects that discipline. Kits are produced to the exact size and shape of the original component, developed from OEM samples and drawings rather than from reverse-engineered approximations. That single decision removes the most common cause of aftermarket failure in this category, which is a bushing or collar that installs but leaves measurable axial play that later shows up as camshaft float. The kits cover drum brake applications across medium-duty trucks, heavy-duty trucks and light commercial vehicles, and the company has extended the same platform into brake shoe hardware, return springs and anchor pins so that a distributor can consolidate several related line items with one supplier.

Material selection is deliberate rather than opportunistic. Products are manufactured to ISO 9001 quality standards, and the company maintains fully equipped production and inspection facilities, with professional technical support running through the development of any new reference. The product range exceeds 200 types, which matters to aftermarket buyers because a supplier with a broad catalogue is far more likely to hold tooling for the specific axle platform you need instead of quoting a lead time for a first-off part. Customisation is offered across material selection, branding and packaging, and dimensional specification, so private-label programmes can be built without changing the underlying part.

Logistically, the factory sits close to Ningbo Port, which keeps inland transport short and freight cost predictable for container consolidations. A dedicated service team responds to technical and order questions around the clock and provides production and shipment status updates while the order is running, a level of communication that most buyers only discover the value of when a vessel is about to cut off.

QuanZhou LiCheng Fuhui Auto Parts Co., Ltd.

Fuhui was established in 1986 and has spent nearly four decades concentrating on one product family: brake camshafts, or S-camshafts, and equalizer pins for the axles of heavy trucks, semi-trailers, trailers and passenger vehicles. The company operates from the Jiangnan High-Tech Industrial Zone in Licheng District, Quanzhou, and it owns the complete production chain from raw material to finished part rather than buying in semi-finished components.

That vertical control runs through blanking, forging, CNC double-face milling, CNC turning, cam profile machining, spline milling, high-frequency induction quenching, CNC cylindrical grinding, surface treatment and packing. Each step is completed in-house and inspected against the next step's requirements, which is the only reliable way to hold cam lobe geometry and spline index accuracy together on the same shaft. The published specification for the family is instructive for buyers: base material 45# or 40Cr carbon structural steel, surface hardness 50 to 60 HRC, quenching depth 1.5 to 3.5 mm, parallelism within 0.08 mm, tooth counts from 10 to 37, and phosphate, black or grey surface finishing to customer specification.

The company is certified to IATF 16949:2016 and supplies brake camshafts directly to major domestic axle and vehicle manufacturers. It has also developed its own CNC camshaft milling machine, an internal engineering achievement that won recognition at an international inventions exhibition and took a silver award in Paris, which says something about how seriously the firm treats profile machining rather than treating it as a bought-in operation.

For export buyers, Fuhui's relevance is straightforward. It is a camshaft-first factory, not a general brake parts trader, with forging, heat treatment and grinding under one roof and a documented hardness and depth specification you can audit. Minimum order quantities are workable at around 400 pieces for a left and right pair pack, samples are available, and delivery typically runs seven to twenty-five days depending on specification.

Hubei Shenli Auto Parts Co., Ltd.

Hubei Shenli Auto Parts, based in the Yingshan Economic Development Zone of Huanggang, Hubei Province, is one of the larger specialised brake camshaft producers in central China. Established in 2004 and operating as a joint-stock company with registered capital of RMB 66 million, it concentrates on two product families: automotive half shafts and brake camshafts.

The camshaft side of the business is built on forging followed by controlled heat treatment and precision machining, and the company holds a substantial patent portfolio covering both the products and the fixtures used to produce them. That patent activity is a useful signal for an export buyer. A factory that keeps filing on clamps, measuring fixtures and process equipment is usually a factory that has had to solve real dimensional problems in production rather than one that assembles from purchased parts.

Shenli has been recognised as a provincial high-tech enterprise and as a specialised and innovative small giant enterprise, a designation reserved for manufacturers holding a defensible position in a narrow technical niche. It serves the domestic OEM channel through established truck and bus builders as well as export assembly programmes, and it maintains long-term technical cooperation with several universities, including joint research centres focused on materials and forming. That academic link matters for camshaft work because it feeds back into heat treatment control and material selection rather than remaining a marketing association.

For buyers, Shenli is a strong candidate when the requirement is a forged brake camshaft with traceable metallurgical process control and a supplier large enough to absorb volume orders but still focused enough that camshafts are a core business rather than a catalogue filler. The company's size and certification profile make it suitable for buyers who need supplier audits or who intend to develop a private-label line for heavy-duty truck applications.

Shiyan Hongzhao Auto Parts Industrial Co., Ltd.

Shiyan Hongzhao, located in the Shiyan Industrial New Area of Hubei Province, was established in 2005 with registered capital of RMB 30 million and employs close to 190 people. It began with a single product, valve tappet bodies, and expanded deliberately into camshafts after building the internal technical capability to develop them. Today the dominant products are internal combustion engine camshafts, both one-piece and assembled, alongside valve tappets and valve guides.

The company is a supplier to major engine manufacturers in the Cummins network, which imposes a level of process documentation and dimensional discipline that most aftermarket-only suppliers never encounter. Its assembled camshaft programme is technically notable: by building the shaft from separately formed lobes and a tube, the design reduces weight by more than sixty percent against a conventional one-piece casting. For heavy-duty applications where parasitic mass affects both fuel consumption and valvetrain inertia, that is a meaningful engineering difference rather than a marketing claim.

Hongzhao holds more than forty valid authorised patents, including eight invention patents, and has been recognised as a national high-tech enterprise, a specialised and innovative small and medium enterprise, and a provincial manufacturing single-item champion. It operates a provincial-level industrial design centre and maintains environmental, energy, occupational health and quality management system certifications, which together indicate a factory that a European or North American buyer can audit without discovering gaps in documentation.

The practical value for a brake or engine parts importer is the combination of Cummins-tier quality systems with independent ownership and direct export rights. The company holds its own import and export licences, which simplifies contracting for buyers who would otherwise need to route through a domestic trading intermediary.

Henan Zhonghui Power Co., Ltd.

Henan Zhonghui Power, based in Bo'ai County, Jiaozuo, Henan Province, was founded in 2007 and has grown into one of the more heavily equipped camshaft plants in the country. Registered capital stands at RMB 50 million, the site occupies roughly 168,000 square metres, and the company reports an annual capacity of three million camshaft pieces. Headcount is in the low two hundreds, which means the plant is capital-intensive rather than labour-intensive.

The production equipment list is the most useful thing to examine here, because it reveals how seriously casting quality is treated. The foundry runs a Japanese automatic moulding line and a full Danish sand processing system, and material analysis is performed on a British spectrometer. On the machining side the plant operates CNC cam grinding machines from Japanese suppliers alongside a US-made camshaft measuring instrument that verifies lobe profile, lift and phasing to production tolerances rather than by sampling.

Zhonghui has passed IATF 16949 quality management certification together with environmental, occupational health and energy management system certification, and it holds recognition as a national high-tech enterprise, a green factory and a provincial specialised and innovative enterprise. Its customer list runs through several of the largest domestic passenger vehicle and engine programmes, and the company has moved early into the electrification transition by developing range-extender camshafts and motor shafts for new-energy platforms.

For an international buyer, the relevance is a supplier with foundry-level control over camshaft blanks and a metrology department capable of proving conformance. Buyers sourcing camshafts for diesel or heavy-duty engine applications benefit most, since the casting and hardening route used here is the established one for chilled iron and hardened steel camshafts, and the company can support both OEM-standard production and aftermarket catalogue expansion.

CNAIC Chengdu Auto Parts Co., Ltd.

CNAIC Chengdu Auto Parts traces its origins to a state-designated camshaft and wheel production enterprise established in the 1950s, and it has been operating as a legally constituted company since 1980. With registered capital of RMB 42.95 million and around 460 employees, it is the largest organisation in this list and the only one classified as a medium-sized enterprise. Roughly 120 mu of land carries more than 600 machine tools and total assets of RMB 230 million.

The company's technical lineage shows in its process capabilities. It was an early domestic adopter of chilled alloy cast iron, quenchable alloy cast iron and quenchable nodular iron camshaft technology, and it operates specialised production lines dedicated to particular engine families. It also built one of the first assembled camshaft production lines in the country. Reported capacity reaches several million camshaft pieces annually across a catalogue that has accumulated more than four hundred engine references, and a substantial share of the output goes to a major North American vehicle manufacturer's camshaft requirement.

CNAIC Chengdu holds high-tech enterprise status and specialised and innovative SME recognition, maintains a full set of management system certifications covering quality, environment, occupational health and energy, and owns its own export licence. It has supplied original equipment programmes for more than thirty domestic engine and vehicle builders, and it exports to the United States, Japan, the European Union and Southeast Asian markets directly rather than through intermediaries.

The reason to include a factory of this scale in a sourcing shortlist is coverage. For an importer assembling a broad engine parts programme, CNAIC Chengdu can supply a very wide range of camshaft references from a single qualified source, and its long export history means it already understands Western packaging, labelling and documentation expectations. Buyers should expect a formal qualification process rather than a quick quotation, which is a reasonable trade for the depth of catalogue on offer.

Shaoxing Chida Auto Parts Manufacturing Co., Ltd.

Shaoxing Chida occupies a specific and useful position in this list: it is a brake system specialist that produces both the adjustment mechanism and the camshaft that mechanism drives. Established in 2006 in the Keyan subdistrict of Keqiao District, Shaoxing, the company operates from a site covering 33,000 square metres with 42,500 square metres of built floor area and registered capital of RMB 10 million.

That combination matters technically. A dragging brake can originate in the slack adjuster, in the camshaft, or in the hardware between them, and a supplier that manufactures all three understands where the responsibility boundaries sit when a customer reports a fault. Chida's product range covers automatic and manual slack adjuster series for both domestic and export markets, together with brake camshafts and axle-end monitoring systems. The company reports annual sales volume in the millions of sets and supplies several major domestic truck, bus and special vehicle builders as well as axle manufacturers.

The company is certified to IATF 16949:2016 and ISO 14001:2015, and holds national high-tech enterprise status together with provincial product technology centre, product testing centre, technology enterprise and specialised and innovative SME recognition. Its technical centre employs a product development team including senior engineers with automotive backgrounds and external specialists retained from universities and foreign enterprises, and the company reports a research budget exceeding five percent of sales. One of its developments, an automatic brake lining wear monitoring and warning adjuster, filled a gap in the domestic commercial vehicle market and was priced at roughly six times a conventional unit, which illustrates the value of genuine functional innovation in this category.

For buyers, Chida is particularly relevant if you are sourcing matched sets rather than individual components. Ordering the slack adjuster, the camshaft and the repair hardware from one qualified factory removes the dimensional finger-pointing that otherwise slows down warranty resolution.

Xingtai Hechang Auto Parts Manufacturing Co., Ltd.

Xingtai Hechang, operating from the Renze District Economic Development Zone in Xingtai, Hebei Province, has been producing automotive components since 1989. The company invested heavily in a modernised facility with total investment reported at RMB 120 million and a site of thirty mu, located close to major expressway and national highway links and within practical reach of the Beijing-Guangzhou rail corridor.

Hechang's product focus sits squarely in the trailer and heavy truck segment. It manufactures air suspension systems, brake camshafts and trailer twist locks, with reported annual output of 60,000 air suspension sets, 300,000 brake camshaft pieces and 200,000 twist lock units. That is a meaningful camshaft volume for a company of its size and reflects a genuine specialisation rather than occasional production.

The manufacturing route integrates forging, turning, precision grinding and heat treatment in one facility, supported by horizontal hydraulic presses, lathes, milling machines, high-frequency quenching equipment, grinding machines, thread rolling machines and shot blasting equipment. A salt spray test machine and electrophoretic coating line are used for corrosion protection verification, which is exactly the capability that matters when supplying markets where road salt exposure drives warranty complaints. The company holds ISO 9000 and IATF 16949:2016 certification and employs a technical team including senior engineers responsible for new product development.

Export is well established, with reported sales into South America, Europe, Africa, Southeast Asia and the Middle East across more than thirty countries. For importers in those regions, Hechang presents a focused trailer parts supplier with in-house forging and a documented corrosion testing regime, and it can quote the camshaft, the suspension components and the coupling hardware as a consolidated trailer programme.

Anhui Guanshun Camshaft Manufacturing Co., Ltd.

Anhui Guanshun Camshaft Manufacturing, based in the Jinshen Township Industrial Zone of Tongcheng, Anqing, Anhui Province, is a dedicated camshaft producer with a distinctive export orientation. The company was incorporated in 2016 and holds registered capital of RMB 5 million paid in full, with around thirty-six employees and reported revenue of approximately RMB 10 million. Its management reports two decades of accumulated camshaft production and trading experience behind the current operation.

Where Guanshun differs from the large OEM-focused plants is catalogue breadth aimed at the replacement market. The company states that it can supply more than a hundred vehicle applications covering over a thousand part numbers, spanning passenger cars, trucks, agricultural machinery and heavy equipment. That combination of breadth and small batch flexibility is precisely what an aftermarket distributor needs, because the demand profile for camshaft replacement parts is long-tailed: a distributor may need fifty different references in modest quantities rather than five thousand pieces of one number.

The company operates under ISO 9001 and TS 16949 quality management system certification and supplies standard OEM-equivalent parts to engine builders as well as to the aftermarket. It holds a licence for a dedicated camshaft production line project, and its stated capability includes developing new references directly from customer samples, which reduces the lead time for adding a new application to a distributor's range.

Guanshun has shipped camshafts to the United States, South America, Europe, the Middle East and Southeast Asia across more than forty countries, so it understands export packaging and documentation requirements in those markets. For importers who need catalogue depth and willingness to run moderate quantities across many references, this is a sensible counterpart to the high-volume OEM-focused factories elsewhere in this list.

Jiangsu Hengming Auto Parts Manufacturing Co., Ltd.

Jiangsu Hengming Auto Parts Manufacturing operates from Jingjiang in Jiangsu Province, on the northern bank of the Yangtze within easy reach of the Shanghai and Ningbo port clusters. The business traces its manufacturing origins to 1998 and was incorporated as a limited company in 2001, with registered and paid-in capital of RMB 10.6 million and a site covering roughly 60,000 square metres.

Hengming's core competence is forged and machined brake camshafts for commercial vehicles, produced alongside related shaft components. Its business scope explicitly includes forging, which is significant because forged camshaft blanks deliver a better grain flow than cast or machined-from-bar alternatives, giving improved fatigue resistance at the spline and cam head where the highest bending loads concentrate.

The company holds ISO 9001 and ISO/TS 16949 quality management system certification, obtained and maintained across successive revisions, and it has been recognised by major domestic truck manufacturers as a preferred quality supplier. Its customer base includes several of the largest heavy truck and bus programmes in China, and it holds registered trademarks together with patents covering specific camshaft designs and the inspection fixtures used to verify them, including equipment for checking camshaft condition on a test rig.

For an export buyer, Hengming's value is a long-standing, forge-integrated camshaft specialist with an established OEM supply record and two decades of continuous production experience. It suits buyers building a heavy-duty brake camshaft programme who want a partner capable of holding cam profile and spline geometry over repeated orders, and who value a factory whose technical team has been solving the same manufacturing problem for a long time.

The specification sheet is only a starting point. These are the checks that separate a supplier capable of repeatable quality from one that can produce a good first sample.

Two camshaft types dominate the applications behind these kits, and the distinction affects how the shaft is produced and what you should expect to pay. A single overhead camshaft engine uses one camshaft per cylinder head and typically two valves per cylinder, making it the older and simpler arrangement. A double overhead camshaft engine runs two camshafts per bank and is normal wherever an engine has more than four valves per cylinder, because the extra intake and exhaust valves need larger gas flow openings and therefore a separate shaft to actuate them.

Material choice follows the same logic. Chilled iron casting is highly resistant to scuffing and is the established material for volume production of overhead camshafts; it costs more than ordinary cast iron but resists wear across operating conditions that would damage a softer material. Steel is an excellent camshaft material in the right application, but the specific grade must be matched to the cam follower it runs against, because different steel grades have different scuffing characteristics and an unmatched pair will fail prematurely even if both parts meet their individual specifications.

Manufacturing a camshaft of this type starts with casting from a heat-treatable grey cast iron with a high carbide microstructure. The casting is annealed while the carbides are retained and then cooled to room temperature. Lobe and journal surfaces are subsequently surface hardened, and the shaft is machined to final geometry afterwards. A representative heat treatment cycle heats the camshaft to 871 degrees Celsius over approximately twenty minutes, holds at that temperature for a further twenty minutes, then treats the shaft at 871 to 893 degrees Celsius for about eighty minutes before rapid cooling to roughly 204 degrees Celsius within about ninety minutes and final air cooling. Understanding this sequence explains why camshaft lead times are longer than for simple turned parts and why heat treatment capacity, not machine tool count, is often the real production constraint.

A complete camshaft assembly comprises the cam itself, which opens and closes the valves and is the functional heart of the part; the cam follower, which transfers the lobe motion to the valvetrain; the driveshaft, which transmits rotation from the crankshaft or operates independently; the shaft, which supports and binds the assembly and carries the combustion engine loads; the bearings, which hold the shaft in alignment and reduce friction during rotation; the lobes, which regulate the exchange of fuel and exhaust gases at a speed proportional to engine speed; and the chain sprocket, which links to the timing belt to keep camshaft and crankshaft timing synchronised. In a repair kit context, the bearings, bushings, washers, collars, rings and grease nipples are the components that restore the relationship between those primary parts, which is why their dimensional accuracy governs the outcome of the whole job.