November 27-30, 2026
Guangzhou Canton Fair Complex Area D
November 27-30, 2026
Guangzhou Canton Fair Complex Area D
2026-10-20
Dongguan Xinli Precision Tools Co., Ltd. will exhibit at "AUTO TECH China 2026 — The 13th Guangzhou International Automotive Parts & Processing Technology, Automotive Mold Exhibition" from November 27 to 30, 2026, at Area D of the Canton Fair Complex in Guangzhou. As an enterprise specializing in the manufacturing and sales of cutting tools, Xinli Precision will present its precision machining tools, including solid carbide milling cutters, graphite-specific tools, and high-gloss aluminum milling cutters, demonstrating its supporting capabilities in the field of automotive parts cutting and machining.
Founded in 2011 and located in Humen Town, Dongguan, Guangdong — a renowned manufacturing city — Dongguan Xinli Precision Tools Co., Ltd. has been deeply engaged in the precision tool field for over a decade. It is a comprehensive enterprise integrating design, R&D, manufacturing, sales, and application services.
Xinli Precision Tools focuses on the R&D and production of cutting tools such as drill bits, reamers, step drills, and PCD tools. With a deep understanding of precision machining, its products are widely used in hydraulic valve bodies, automotive parts, consumer electronics, and mechanical equipment — industries with stringent precision requirements. In particular, for the machining challenges of multi-stage steps and high-precision hole systems in hydraulic valve bodies, the company provides mature integral cutting solutions dedicated to improving efficiency and ensuring machining quality for customers.
Adhering to the development philosophy of "Integrity at Heart, Precision on the Edge," the company not only provides standard tools but also customizes non-standard tools according to customer needs. It upholds the business tenet of "Building Trust with Quality, Creating Value with Service," using advanced manufacturing processes and a strict quality control system to reduce costs and increase efficiency for every customer. Xinli Precision is ready to join hands with you — cutting the future with precision edges, achieving win-win development together!
Exhibits
1. High-Speed Adjustable Expansion Reamer for Bearing Holes
The tool features an integrated dial adjustment mechanism at the front end, enabling diameter fine-tuning directly on the machine spindle while maintaining radial runout of all edges — no need to transfer to a tool presetter. It supports center-through coolant and high-pressure cooling, effectively flushing chips and preventing iron chips from scratching the workpiece surface. The inserts can be reground and refurbished multiple times, with no compromise in service life after replacement, significantly reducing the cost per hole.
The internal expansion adjustable structure provides diameter adjustment precision of up to 0.001mm and a compensation range of ±0.02mm, allowing micro-adjustment to restore dimensions after tool wear without frequent tool changes. The multi-edge design (Z≥6) combined with high-speed machining delivers feed efficiency 5–10 times that of single-edge guide pad boring tools — the precision reaming cycle for a D80 steel sleeve bearing hole is only 1–3 seconds per hole. Hole tolerance is stably controlled at IT6 grade or above, with a qualification rate ≥99.98%, and surface roughness consistently maintained below Ra1.6, reaching up to Ra0.4μm.
Designed specifically for precision reaming of high-precision bearing holes, it is widely used in scenarios such as steel sleeve bearing holes in NEV electric drive housings, bearing holes in transmission and reducer housings for fuel vehicles, and motor rotor bearing mounting holes. Applicable materials include quenched and tempered steel, stainless steel, cast iron, high-hardness alloys, and aluminum alloys.
2. High-Speed PCD Face Milling Cutter
The cutting tips use PCD (polycrystalline diamond), offering high hardness and excellent wear resistance, capable of withstanding high-speed cutting and rapid feed — suitable for mass production. Compared with traditional carbide tools, it delivers higher machining efficiency, longer tool life, fewer tool changes, and shorter downtime, helping reduce cost per part. Machined surface roughness can consistently reach below Ra0.4μm, with finish approaching a mirror surface — many workpieces require no subsequent polishing.
The cutter body features a dense-tooth layout, with many inserts cutting simultaneously for high material removal rate per unit time and higher efficiency. The cutter body undergoes precision dynamic balancing, producing minimal vibration during high-speed rotation, resisting chatter marks, and better protecting the machine spindle. Inserts feature wiper edges and deburring edge profiles, achieving good flatness and surface quality in a single pass. Internal coolant nozzles deliver coolant directly to the cutting zone for smooth chip evacuation and reduced chip scratching. The steel-aluminum composite cutter body combines rigidity and lightweight design for more stable high-speed machining.
Primarily used for precision face milling of non-ferrous metal parts such as aluminum alloy, magnesium alloy, and copper alloy — including joint surfaces of NEV motor housings, engine cylinder blocks and heads, and transmission housings. It also reliably machines aluminum-silicon alloys and certain composite materials.
3. Cermet Adjustable Expansion Reamer
The tool adopts an expansion structure with micro-adjustable diameter and a compensation of 0.02mm. After tool wear, there is no need for immediate tool change — on-machine compensation restores dimensions, reducing tool setting and downtime. The multi-edge design ensures smooth cutting and good hole diameter consistency, while the internal coolant structure ensures smooth chip evacuation. Cermet inserts are wear-resistant and can be reground multiple times; combined with expansion compensation, single-tool service life is longer, helping reduce cost per hole.
Made of cermet material, it maintains high hardness while offering better toughness — resistant to chipping and wear, less prone to built-up edge during machining, and more stable hole wall finish. Compared with ordinary carbide reamers, cutting is lighter and faster, adaptable to higher speeds and feeds with higher efficiency.
Suitable for precision hole reaming of carbon steel, alloy steel, stainless steel, cast iron, and other materials. Commonly used for bearing holes, hydraulic valve holes, connecting rod holes, gear holes, and housing hole systems. Especially suitable for machining scenarios with high requirements for hole diameter accuracy, surface roughness, and batch consistency.
4. Composite Step Reamer
Suitable for precision machining of stepped holes and coaxial holes in automotive transmissions, engines, hydraulic valve bodies, motor housings, and other parts. Can machine steel, cast iron, and aluminum alloy materials.
Integrates multi-level hole diameters, step faces, and chamfers into a single tool — completing multi-stage machining in one pass, reducing tool changes and process turnover, and significantly shortening machining cycle time. High coaxiality between steps and good consistency of hole diameter and depth make it suitable for mass production.
Adopts high-speed reaming design with light and fast cutting and smooth chip evacuation; combined with internal coolant, it effectively flushes chips and reduces temperature. Dimensional accuracy stably reaches IT7 grade or above, and surface roughness can be controlled within Ra0.8μm. Inserts can be reground and refurbished with long service life, helping reduce cost per part.
5. Corn Milling Cutter
The cutter body features multiple spiral cutting units arranged along the axial direction, with a high number of effective teeth and larger feed per revolution — machining efficiency is 1–2 times higher than ordinary milling cutters. Multiple edges share the cutting load, resulting in slower tool wear and a service life increase of over 30%.
The wave-edge design makes cutting lighter and faster, ensures smooth chip evacuation, reduces workpiece surface waviness, and improves finish — reducing the need for subsequent finishing. With wear-resistant coating, it resists adhesion and high temperatures; inserts support indexable replacement for economical and worry-free use.
Suitable for heavy stock rough milling and semi-finish milling of mold steel, stainless steel, cast iron, aluminum alloy, and titanium alloy. Commonly used for mold cavities, step faces, and deep groove machining.
6. Adjustable Small Taper Shank Valve Guide Reamer — The Stable Choice for Engine Valve Guide Hole Precision Machining
Suitable for precision reaming of valve guide holes in automotive engine cylinder heads. The dimensional tolerance, cylindricity, and surface roughness of valve guide holes directly affect the smoothness of valve movement and engine sealing performance.
The tool adopts a small taper shank connection structure, with simultaneous positioning of the shank taper surface and end face — ensuring high clamping repeatability and fast, time-saving tool changes. The diameter features an adjustable mechanism, allowing on-machine micro-adjustment compensation after wear without frequent replacement of the entire tool. Edge material options include PCD or carbide; PCD tools offer outstanding wear resistance, more stable consistency of machined holes, and service life reaching thousands of pieces. The tool body has built-in cooling channels, delivering cutting fluid directly to the cutting edge for smooth chip evacuation and helping maintain hole wall finish. The tool body offers good rigidity and stable machining, suitable for high-volume precision reaming of engine cylinder head valve guide holes.
7. PCD Step Reamer — An Efficient Solution for One-Pass Multi-Level Hole Forming
The tool integrates multi-level hole diameters, step faces, and chamfers into one body, completing multi-stage machining in a single pass — reducing tool changes and process turnover for shorter cycle times. PCD inserts offer high hardness and excellent wear resistance, suitable for high-speed cutting, with stable hole dimensions, good coaxiality, and strong batch consistency. The tool body offers good rigidity; combined with internal coolant for smooth chip evacuation, hole wall finish is stable with surface roughness within Ra0.8μm. Inserts can be reground and refurbished with long service life, helping reduce cost per part.
Suitable for precision machining of stepped holes and coaxial holes in automotive engines, transmissions, hydraulic valve bodies, motor housings, and other parts. Can machine aluminum alloy, cast iron, and some steel parts.
8. Valve Guide Reamer — An Efficient Choice for Engine Valve Guide Hole Machining
The dimensional accuracy, cylindricity, and surface roughness of valve guide holes directly affect valve movement, sealing performance, and overall engine performance. This tool is designed for precision reaming of valve guide holes in automotive engine cylinder heads, suitable for powder metallurgy guides, alloy cast iron, and other materials, and for high-cycle mass production.
The cutting edge uses PCD polycrystalline diamond, offering high hardness and excellent wear resistance — minimal hole diameter variation during machining, good workpiece consistency, and service life several times that of carbide tools. The small taper shank uses simultaneous taper and end-face positioning for quick tool changes, with PCD edge runout controllable within 0.003mm. The diameter features an adjustable mechanism for on-machine micro-adjustment compensation after wear, reducing tool change downtime.
The tool body has built-in cooling channels delivering cutting fluid directly to the cutting edge for smooth chip evacuation and stable hole wall finish, with surface roughness reaching within Ra0.8μm. The tool body offers good rigidity and stable machining; single-tool life can reach thousands of pieces, helping reduce cost per hole — a reliable choice for precision reaming of engine cylinder head valve guide holes.
9. Bearing Hole Forming Tool
Suitable for precision machining of bearing holes in automotive transmission housings, NEV motor housings, reducer housings, and bearing seats. Can machine cast iron, aluminum alloy, steel, and other materials.
The tool integrates multi-level hole diameters, step faces, chamfers, and transition arcs of bearing holes into one body — completing forming machining in a single pass, reducing tool changes and process turnover, shortening cycle time, and providing more stable coaxiality and positional accuracy. Multi-level edges can be customized to workpiece dimensions, ensuring small hole diameter fluctuation and good consistency in mass production.
The tool body offers good rigidity; combined with internal coolant structure, cutting fluid reaches the cutting zone directly for smooth chip evacuation and stable hole wall finish, with surface roughness within Ra0.8μm and dimensional accuracy reaching IT7 grade or above. Inserts can be reground and refurbished with long service life and lower cost per part. The one-piece forming design makes bearing hole machining simpler and more suitable for high-cycle production lines.
10. PCD Forming Milling Cutter
The tool integrates multi-level contours, step faces, chamfers, and transition arcs into one body — completing multi-feature forming machining in a single pass, replacing traditional multi-tool sequential machining, reducing tool changes and process turnover, and greatly shortening cycle time. The cutting edge uses PCD polycrystalline diamond with high hardness and excellent wear resistance; cutting speed can reach 2–3 times that of carbide tools, with tool life improved dozens of times — suitable for high-volume high-speed production. The tool body offers good rigidity; combined with internal coolant for smooth chip evacuation, it maintains stable dimensional accuracy even under large cutting allowances, with surface roughness within Ra0.4μm and high contour consistency, reducing subsequent finishing operations. Inserts can be reground and refurbished for lower cost per part.
Suitable for complex contour forming of aluminum alloy and non-ferrous metal parts such as automotive engine cylinder blocks and heads, transmission housings, steering knuckles, and motor housings. Also suitable for precision forming milling of non-metallic materials such as carbon fiber composites.
11. PCD Corn Milling Cutter — An Efficient Solution for Heavy Stock Removal in Aluminum Alloy
Inserts use PCD polycrystalline diamond with high hardness and excellent wear resistance, resisting aluminum adhesion; tool life can reach dozens of times that of carbide tools, reducing tool changes and downtime. Inserts are densely arranged along a spiral line with many effective teeth, large feed per revolution, high metal removal rate, and machining efficiency far exceeding ordinary milling cutters.
The cutter body undergoes dynamic balancing for minimal vibration and smooth cutting at high speeds. The high-strength steel integral cutter body offers good rigidity, suitable for stable machining under large cutting parameters. Inserts can be reground and refurbished, offering better economy than solid PCD tools.
Suitable for rough and semi-finish machining of aluminum alloy, copper alloy, and other non-ferrous metals, as well as fiber composites, engineering ceramics, glass, and engineering plastics. Commonly used for heavy stock milling of automotive transmission housings, engine cylinder blocks, motor housings, and other parts.
12. PCD Forming T-Slot Cutter — An Efficient Solution for One-Pass T-Slot and Internal Undercut Forming
The tool integrates T-slots, undercut grooves, chamfers, and transition contours into one body — completing forming machining in a single pass, replacing multi-tool sequential operations, reducing tool changes and process turnover, and shortening cycle time. The cutting edge uses PCD polycrystalline diamond with high hardness and excellent wear resistance, resisting aluminum adhesion; tool life far exceeds carbide tools — suitable for high-speed high-volume production.
The cutter body uses high-strength carbide with a reinforced neck design, resisting deflection or breakage in heavy-duty groove machining; dynamically balanced for smooth high-speed rotation. Inserts can be reground and refurbished for lower cost per part.
Suitable for T-slots, internal undercut grooves, O-ring grooves, and fluid channel machining in aluminum alloy, copper alloy, and other non-ferrous metals as well as carbon fiber composites. Commonly used in machine tool worktables, automotive fixtures, aerospace structural parts, and engine components.
13. Bearing Hole Reamer
Suitable for precision reaming of bearing holes in automotive transmission housings, NEV motor housings, reducer housings, bearing seats, pump and valve bodies, and other parts. Can machine cast iron, aluminum alloy, steel, stainless steel, and other materials — suitable for high-precision hole machining in mass production.
Multi-edge cutting with good guidance and smooth cutting; hole accuracy can stably reach IT7 grade or above, with precision reaming reaching IT6 grade; good roundness and cylindricity with strong batch consistency. Surface roughness can be controlled within Ra0.8μm, reducing subsequent grinding or polishing operations and improving bearing assembly quality. Edge material options include carbide, cermet, or PCD, combined with wear-resistant coating for long tool life.
14. PCD Composite Reamer
Integrates multi-level hole diameters, step faces, chamfers, and transition arcs into one body — completing forming reaming in a single pass, reducing tool changes and process turnover, shortening cycle time, and providing more stable coaxiality and positional accuracy. The cutting edge uses PCD polycrystalline diamond with high hardness and excellent wear resistance, resisting tool adhesion, suitable for high-speed reaming, with service life far exceeding carbide tools.
The multi-edge design ensures smooth cutting; hole accuracy can reach IT7 grade or above, with surface roughness stably within Ra0.8μm. The internal coolant structure delivers cutting fluid directly to the cutting edge for smooth chip evacuation and prevents chips from scratching the hole wall. Supports customization of diameter, steps, and edge length according to drawings; inserts can be reground and refurbished for lower cost per part — suitable for high-volume high-speed production.
Suitable for precision machining of multi-level holes, stepped holes, and coaxial holes in automotive engines, transmissions, motor housings, hydraulic valve bodies, and other parts. Can machine aluminum alloy, cast iron, and steel parts.
15. PCD Forming Reamer
Specifically designed for machining pre-formed stepped holes, chamfered holes, and special-shaped hole contours on parts. Suitable for precision reaming processes of aluminum alloy and cast iron parts such as automotive transmission housings, engine cylinder blocks, servo housings, and hydraulic valve bodies.
Multiple groups of cutting edges are arranged on the tool body according to step dimensions and chamfer positions — a single axial feed completes precision reaming of multiple steps and chamfers within the hole, eliminating the need for multiple tools in sequential machining. Machining efficiency is 2–5 times that of traditional carbide tools. PCD inserts offer high hardness and excellent wear resistance; when machining cast iron and hardened steel, service life is 5–10 times that of carbide tools.
Cutting edges are precision form-ground, with contour dimensions strictly corresponding to drawings — hole coaxiality and cylindricity are stable and controllable. Multi-edge staggered tooth structure can be adopted for smooth cutting and good roundness and hole diameter consistency.
16. Hydraulic Flange Reamer
Adopts a flange positioning structure with adjustable radial and axial runout — ensuring high clamping repeatability, effectively eliminating the influence of spindle error on machining, and keeping the reamer always aligned with the hole center. After tool head wear, micro diameter compensation can be performed without frequent tool changes, ensuring more stable hole dimensional consistency — suitable for mass production of hydraulic parts.
Suitable for precision hole reaming of hydraulic valve blocks, pump housings, motor housings, reducer flanges, and other components. Can machine cast iron, aluminum alloy, and steel parts. The sealing and fitting performance of hydraulic parts directly depends on the dimensional accuracy and surface quality of the holes.
17. High-Precision Hole Reamer
Reaming itself is a finishing process with higher efficiency than grinding and honing. Combined with high speed and reasonable feed, the machining cycle is short — suitable for mass production. Edge material options include carbide, cermet, or PCD; supports customization of diameter and edge length according to drawings. The internal coolant structure delivers cutting fluid directly to the cutting zone for smooth chip evacuation and prevents chips from scratching the hole wall. Inserts can be reground and refurbished for lower cost per hole.
The combination of multi-edge cutting and guiding structure ensures uniform cutting force distribution — hole coaxiality, roundness, and cylindricity are stable and controllable, with good hole diameter consistency in mass production, reducing assembly problems caused by coaxiality deviation.
Suitable for high-precision hole reaming of automotive engines, transmissions, hydraulic valve bodies, motor housings, and other parts. Covers materials including cast iron, carbon steel, alloy steel, stainless steel, and aluminum alloy.
18. High-Precision Hole Reamer
If the multi-step holes in motor housings are machined with multiple tools, each tool change introduces new clamping and runout errors, making it difficult to ensure coaxiality between steps. This composite boring tool adopts a stepped composite design, integrating multiple diameters and steps into one tool — rough machining, semi-finish machining, and finish machining can be completed simultaneously. A single pass replaces traditional multiple tool changes, significantly improving machining efficiency. One clamping completes all forming machining, ensuring more stable coaxiality and dimensional consistency between steps and avoiding cumulative errors. Combined with PCD inserts and optimized cutting parameters, hole wall surface roughness is stably within Ra0.8μm with good finish, reducing subsequent dressing operations.
Suitable for precision boring of NEV drive motor housings, stator housings, and bearing mounting holes. Covers lightweight materials such as aluminum alloy.
