Business Details
Precision CNC Machining Services in Finchampstead
Established over four decades ago, J & L Precision has built a reputation as a trusted subcontract machining partner serving the Motorsport, Automotive, Aerospace, and Oil & Gas sectors. Based in Finchampstead within the M3/M4 corridor, we specialise in precision engineering solutions, including CNC Machining, Deep Hole Drilling, and Honing, supported by a network of quality-approved suppliers. Our commitment to excellence is underscored by ISO 9001:2015 certification and continuous investment in advanced machinery, such as our recent acquisition of Citizen A20 Sliding Head Lathes and a CNC Thread Rolling machine. With a team of experienced engineers, we deliver complex components to exacting standards, combining traditional craftsmanship with cutting-edge technology.Our capabilities span 5-axis machining, manual machining, and CAD/CAM programming, ensuring we meet diverse client needs. Operating from modern facilities equipped with state-of-the-art inspection tools, we prioritise quality, consistency, and customer satisfaction. Our long-standing relationships with clients are built on reliability, technical expertise, and a deep understanding of industry challenges. As a family-owned business, we maintain a hands-on approach, ensuring every project benefits from personal attention and a culture of continuous improvement. This dedication has solidified our position as a leader in precision engineering, serving clients who demand excellence in every component we produce.
Services
CNC Milling
CNC Turning
Thread Rolling
Deep Hole Drilling
Honing
Manual Machining
Jig Boring
5-Axis Machining
Gun Drilling
CAD/CAM Programming
Highlights and features
- Over 40 years of precision engineering experience in critical industries
- ISO 9001:2015 certified quality management systems
- Continuous investment in advanced CNC machinery and inspection equipment
- One-stop shop with access to quality-approved specialist suppliers
- Expertise in 5-axis machining for complex, high-performance components
Associations and certifications
- ISO 9001:2015
Services
CNC Milling
Our 3, 4, and 5-axis CNC milling capabilities handle prismatic and turned parts with exceptional accuracy. Specialising in high-performance aluminium and magnesium castings for Motorsport applications, we utilise Mazak machining centres with travel ranges up to 730 x 850 x 560mm. This service delivers complex geometries for aerospace and defence sectors requiring tight tolerances.
CNC Turning
CNC turning services accommodate components from 6mm to 300mm diameter with shaft work up to 1000mm length. Our Yamazaki Mazak and Citizen sliding head lathes with live tooling enable complex turned parts. Recent investments include two Citizen A20 machines with sub-spindles, enhancing our capacity for high-precision, multi-axis turned components.
Thread Rolling
New CNC thread rolling facilities produce high-strength metric threads from M4 to M12. This cold-forming process creates durable threads with improved fatigue resistance for critical applications. The technology suits production runs requiring consistent quality in fasteners and threaded components for automotive and industrial sectors.
Deep Hole Drilling
Specialist deep hole drilling handles diameters from 4mm to 38.1mm with depths up to 600mm. Using Mollart and Delapena equipment, we achieve tight tolerances for oil & gas components. The process combines precision with efficient chip removal, essential for long-reach drilling applications requiring straightness and surface finish integrity.
Honing
Honing services refine internal diameters from 10mm to 37mm with 600mm maximum length. This microfinishing process achieves exact geometries and surface finishes for hydraulic components and engine parts. Our Delapena honing machines ensure dimensional accuracy and cross-hatch patterns required for critical sealing surfaces in aerospace applications.
Questions
What industries does J&L Precision serve?
We specialise in Motorsport, Automotive, Aerospace, Oil & Gas, and Defence sectors requiring precision-engineered components.
Are your machining services ISO certified?
Yes, we maintain ISO 9001:2015 certification with certificate number 11951 for our quality management systems.
What CNC machining capabilities do you have?
We offer 5-axis machining up to 730 x 850 x 560mm travel, turning up to Ø300mm, and thread rolling from M4-M12.
Do you offer deep hole drilling services?
Yes, our deep hole drilling handles diameters 4mm-38.1mm with depths up to 600mm using specialist Mollart equipment.
What quality inspection methods are used?
We employ Mitutoyo CMMs, shadowgraphs, and digital height gauges to ensure precision to 0.001mm tolerances.