DLI Engineering

Trimdon Grange, Industrial Estate, Trimdon Grange, TS29 6PA

Sets it apart · CNC Machining — UK · scanned 2026-08-20— click a claim to see its decomposition

About

DLI Group Ltd, a UK-based contract manufacturer with nearly 40 years of experience operating from a 20,000 sq/ft facility in Trimdon Grange, Co. Durham, offers comprehensive precision engineering and CNC cutting services, including extensive milling and turning capabilities supported by advanced 5-axis and twin-pallet machinery. Their specialist processes encompass spark erosion, deep hole drilling, NDE, and various coatings, with divisions like Technical Engineering Resource (TER) and the Seals Division focusing on critical components for the Aerospace and Defence sectors, handling exotic materials and utilizing advanced programming. Holding AS9100D and ISO9001:2015 certifications, DLI Group is a trusted supplier to major prime contractors such as Airbus and BAE Systems, differentiating itself through rigorous quality assurance with CMM inspection and a fully integrated Supply Chain Management System ensuring complete traceability.

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DLI Group Ltd, a UK-based contract manufacturer with approximately 40 years of experience, operates from a 20,000 sq/ft facility in Trimdon Grange, Co. Durham. The group encompasses DLI Engineering Ltd., Technical Engineering Resource (Aerospace) Ltd., and a "machine to print" Seals Division, collectively serving a diverse range of industries.

The company's capabilities include precision engineering and CNC cutting, with extensive milling and turning envelopes, supported by advanced machinery such as 5-axis and twin-pallet units. DLI Group also offers a suite of specialist processes including spark erosion, deep hole drilling, NDE, and various coatings. Technical Engineering Resource (TER) and the Seals Division focus on critical components, particularly for the Aerospace and Defence sectors, working with exotic materials and employing advanced programming software.

DLI Group holds AS9100D and ISO9001:2015 certifications, and has earned approvals from major prime contractors like Airbus and BAE Systems. Their commitment to quality is further demonstrated through comprehensive inspection services utilizing Coordinate Measuring Machines (CMMs) and a fully integrated Supply Chain Management System for complete traceability.

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CNC capability5

Sub-process
Specialist categories
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Named machine brands
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Tier-one builder presence
CAM software

Materials & sectors2

Materials
Industries served

Certifications & approvals3

ISO 9001
AS9100
Primes supplied
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Quality & traceability2

NDT methods
Part marking

Services & production2

DFM support
In-house finishing
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CNC capability: Aerospace-grade CAM · CAD software · In-house design · Tolerance (typical) · Tolerance (tight) · Micro-machining · MOQ (minimum batch) · Lead time (weeks)

Certifications & approvals: ISO 14001 · ISO 13485 · IATF 16949 · NADCAP · ITAR registered

Welding & fabrication: Welding automation · Welding materials · Coded welding (any) · Fabrication offered · Fabrication sub-categories · EN 1090 EXC level

Quality & traceability: Process traceability · CofC offered · Cleanroom assembly · 3D scanning · Industrial CT · In-house toolroom · FAIR capability (AS9102)

Services & production: Repeat orders (Kanban / VMI)