Cut the seat. Fit the guide. Finish the engine.
Serdi UK supplies engine reconditioners, machine shops and classic engine builders from Uxbridge: valve seat inserts, bronze guides, tooling, components and the machines that use them.
- 30,000+valve seat inserts listed
- 20 to 70 mminsert diameters, cast and sintered
- 200+bronze valve guides listed
- 19Comec machines on the webstore
- UK agentfor Machines Serdi and Rottler
“More than merely a supplier of machinery and workshop equipment.”
How Serdi UK describes itself on its own homepage.
Our team has first-hand experience of vintage, historic and modern engines, for the road and for competition. They honed their skills on engines that are still successful in historic motorsport.
That is why the range runs from sintered inserts for modern unleaded engines to manganese bronze guides for classic Ferraris, Porsches and Jaguars.
Product families
Valve seat inserts and bar
More than 30,000 inserts from 20 to 70 mm, in cast and sintered materials, with specifications for unleaded fuel and for heavy duty CNG and LPG use. Seven sizes of seat bar for unusual jobs.
Bronze valve guides
Manganese bronze guides with honed bores for more than 40 makes.
Serdi machines
Profile, 4.5, 3.5, Micro 2000 and more, from a portable unit to CNC.
Comec and Ultratecno
Nineteen Comec boring, resurfacing, refacing and pressure testing machines, and Ultratecno ultrasonic cleaning in three ranges.
Honing and tooling
Stones, mandrels, CBN and PCD tips, boring tools, reamers and abrasives.
Engine components
Bearings, pistons, rings and liners for vintage, veteran, classic and historic engines.
Who we supply
Engine reconditioners and machine shops
Machinery, cutting tips, honing equipment and consumables for professional engine remanufacturers and preparation workshops.
Classic, historic and competition builders
Bronze guides for Ferrari, Porsche, Jaguar, Cosworth and many more, and parts for engines from the 1940s to today.
Cylinder head manufacturers
Small batches and production runs of valve guides or valve seat inserts can be made to your own specification.
The machines that cut the seats
Serdi UK is the UK agent for Machines Serdi S.A. From a portable unit to a CNC machine with Siemens control, here is what the Serdi range covers.
Serdi Profile
14 to 120 mm capacity, 3 kW built-in spindle, Siemens CNC.
Serdi 4.5
16 to 120 mm capacity, 2.2 kW spindle, air floated table bars.
Serdi 3.5
16 to 70 mm capacity, 1.5 kW spindle, digital readout.
Serdi Micro 2000
Portable unit, 16 to 40 mm capacity, no power or air needed.
Makers and agencies
Serdi UK is the UK agent for Machines Serdi S.A. and for Rottler, and supplies a selected range from other leading makers. BERCO tooling and spare parts are available too.
Boring, resurfacing, refacing, pressure testing
Ultrasonic cleaning
Crankshaft grinding, boring, surfacing
Honing machinery and stones
Pro-Bal balancing, CNC blueprinting
Machine shop products
How ordering works
Find the part
Search the webstore by category, or call the team with the engine and the job.
Check the fit
Imperial inserts suit pre-set cutters. Metric inserts need the counterbore sized to the insert less the interference fit.
We dispatch
Stocked orders usually leave the same working day or the next, by courier within the UK.
Need it made?
Small batches and production runs of valve guides or valve seat inserts can be made to a customer specification.
Latest news
3 January 2025
Serdi UK appointed agents for the Rottler range
We have added Rottler to our range of equipment. Contact us for your requirements.
13 June 2024
Serdi spindle cleaning tool back in stock
The tool that keeps the quill free of dirt and metal shards is available again.
Tell us the engine and the job
We will point you to the right insert, guide, tool or machine.