Custom Machined Parts, Made From a Drawing — or No Drawing at All

One Custom Parts Maker, Any Material

EKINSUN takes the job from a photo, a hand sketch or a worn sample — no finished CAD file required. We're a custom parts manufacturer that picks the right process — CNC machining, injection molding or casting — and the right material for your part, and we'll engineer it from whatever you have. Need one piece, a replacement for a discontinued part, or a small batch? That's exactly our lane. As a precision machining company we hold tight tolerances and gauge-verify every part, and we start from whatever you have: sketch, photo or sample.

Real Custom Machined Parts We've Made

Not stock photos — actual customer jobs, each machined from a hand sketch and gauge-verified before it shipped. This is what "custom machined parts, no CAD" looks like in practice:

More jobs in the full case-study portfolio →

Custom Parts by Material

The grade decides the price as much as the shape does. Send the designation if you have it; send what the part has to survive if you do not, and the grade is picked from that.

Substitutes are proposed rather than made silently: if a drawing calls a grade that is slow to source, the quote names the equivalent and what changes with it. The plastics side is compared number by number on the engineering plastics chart — density, water uptake, service temperature, friction and abrasion for ten materials.

Precision Machining Capabilities & Tolerances

Everything a custom machined part needs, verified before it ships. Our precision machining services cover turning, milling, 3/4/5-axis and EDM across our manufacturing network — if your drawing calls out something not listed here, ask; this is a summary, not a limit.

Processes	CNC turning, milling, 3/4/5-axis, EDM, plus vacuum casting & molding for plastic batches
Tolerance	ISO 2768-f general; critical features to ±0.01 mm where specified
Materials	Aluminium, steel, stainless (304/316), brass, titanium · Delrin/POM, nylon, PC, PEEK, PTFE
Part size	Ø1–500 mm turned · up to 800 mm milled envelope
Quantity	1 piece to small-batch production — no setup fee on machined one-offs
Threads	Metric, UNC/UNF/UN, BSP/BSW and non-standard pitches, single-point cut & gauge-verified
Verification	Thread ring/plug gauge, micrometer & caliper, CMM report on request
Certification	ISO 9001:2015 (ISO 13485 for medical parts)

Sizes, Threads and Tolerances, With the Standard Behind Each One

Every row is a number you can put on a purchase order. Where a standard fixes the value, the standard is named so the figure can be checked rather than taken on trust.

A part that sits inside every row is an ordinary job. A part that breaks one of them — a thread pitch outside the standard series, a bore tighter than H6, a diameter over 500 mm — is the one to describe in the enquiry, because that is what sets the price and the lead time.

Five numbers start a quote without a drawing. Largest diameter, overall length, bore or thread, the one feature that has to fit something else, and how many — from 1 piece. A photo with a caliper across the part carries all five. The measuring routine, including the trap where an inch thread reads as a non-round metric pitch, is on how to measure a thread pitch.

Part Features, and What Buyers Call Them

Most enquiries name a feature before they name a material. The left column is the feature; the second is what it gets called on drawings and in searches, which is not always the same word twice. Where a standard fixes the dimension, it is named and the full table is one click away.

A feature the catalogue part does not have is the usual reason a part gets made rather than bought: the size is right, the bore is right, and there is no keyway, no flat, no left-hand thread.

Two features decide most jobs on their own. A keyway ties the part to a shaft diameter, so its width and depth are not free choices — DIN 6885 fixes them, and the keyway size chart lists b × h and t1 / t2 for every shaft from 6 to 500 mm. A thread undercut is the one buyers leave off a sketch and then find the thread will not run to the shoulder; DIN 76-1 sets its width from the pitch, and the thread undercut page has the values.

Custom Parts We Make

Every part below has its own page with specs, materials and how to order — many can be reproduced from a sample with no drawing. Can't buy the part anymore? See replacement parts for machines, pumps and equipment. Keeping a machine running? See replacement machine parts. Need a door part? See custom door hardware. Looking for custom fasteners or adapters & fittings? We make those too. Building or repairing a robot cell? See robot parts — gripper jaws, ISO 9409-1 tool flanges and mounting plates. Developing a device that needs its own enclosure? See payment terminal housings — ABS or PC/ABS shells, molded or CNC machined, with board and display cutouts taken off a reference unit.

Don't see your part? This list is not everything we make — tell us what you need and we'll quote it.

When a Standard Part Is the Right Answer

Roughly one enquiry in five is for a part that already exists in a catalogue at a price no one-off competes with. We say so instead of quoting against it. The table is the dividing line.

"The shaft is 34.6 where it is worn, the housing is 45, and it needs a 12 mm keyway. Every supplier sends me a catalogue page."

That is the shape of most of this work: every number on its own is ordinary, and the combination is not in anyone's catalogue.

CNC Machining From Drawing — Already Have a Sketch or Spec?

If you already have a drawing, DXF, sketch or specification, we go straight to quoting and machining — no back-and-forth needed. CNC machining from drawing is the shortest route: send the file (or a photo of a hand sketch with dimensions) and receive a price and lead time within 12 hours.

We machine parts from your drawing in any material — aluminium, steel, stainless, brass, PEEK, Delrin — to the tolerances and surface finish it calls out. That covers bespoke, non-catalogue components for UK and European customers, and it works the same whether you send a full SolidWorks export or a ruler-annotated photo of a rough sketch: we confirm the geometry with you before any metal is cut.

The full checklist of what to send — and exactly what you get back — is on parts from your design.

No CAD? Order From What You Have

You don't need engineering software to get a custom part. Pick whichever matches what you're holding — our engineers turn it into a confirmed CAD drawing for free:

EKINSUN vs. an Instant-Quote Platform

Upload-a-CAD-file platforms are fast when you already have a finished model and a standard part. For a one-off, an odd part, or something you can only photograph, they're the wrong tool — here's the difference:

	Instant-quote platform	EKINSUN
To get a price	CAD file required	Drawing, sketch, photo or sample
One-off / odd part	Auto-quoted, no human check	A real engineer reviews it
Obsolete part copy	Not supported	Reverse-engineered from the old one
You talk to	A web portal	The people cutting the metal
Minimum order	Often a batch minimum	1 piece, no setup fee

Where each route stops — what an instant quote cannot price, and what a quoted-by-a-person job costs in time instead: instant quote versus custom machining.

Flat and folded sheet-metal parts: laser cutting thickness and tolerance chart · laser-cut plates with holes and cutouts · laser-cut shims and washers 0.03–10 mm · sheet-metal bend radius chart.

Plates are their own family: mounting, adapter, base and fixture plates with tapped holes, counterbores and pockets are on custom machined plates, and plates that film or paper slides over on film guide plates.

Frequently Asked Questions