Sub Contract Engineering

Robert (Bob) Bray had one simple goal for Sinclair Harding, this was to be totally independent and capable of making every part for each clock. This has enabled Sinclair Harding to develop their in-house capacities to include precious metal plating, Fusee chain making, manufacturing and hand tuning bells, French polishing, engraving and hand silvering of dials, Bluing of screws and hands, even mainspring manufacture is now undertaken.  

Our skilled craftsmen coupled together with modern technology have enabled us to offer sub-contract engineering to the highest standard. We are able to work with one offs and batch quantities from design, manufacture to the end product using various materials and finishes.

CNC Milling

- HAAS Super Mini Mill 2 With Nikken NCT200 4th Axis
508mm (X) x 406mm (Y) x 356mm (Z)
10k Spindle Speed (option for 20k spindle speeder)
- HAAS Super Mini Mill
With HAAS HA5C 4th Axis
406mm (X) x 305mm (Y) x 254mm (Z) 10k Spindle Speed
- DMG MORI SEIKI MILLTAP 700 700mm (X) x 420mm (Y) x 380mm (Z)
24k Spindle Speed

CNC Turning

- DMG MORI SEIKI CTX 310 Ecoline Upto 200mm
5k Spindle Speed
- Spinner SB CNC Lathe Max Bar dia 27mm
8k Spindle Speed
- HAAS OL1 Lathe Upto 200mm
6k Spindle Speed

Wire Erosion

- Joemars AWT3S
350mm (X) x 250mm (Y) x 210mm (Z) Max Weight 300kgs


- 2 x Solidworks Professional 2019 (Since 2008)
- OneCNC XR8

Gear Cutting

- Mikron 79 Hobbing Machine 41mm Max cutting dia 0.3 mod to 1 mod
- Sykes V4 Gear Shaper


- Guyson Ultrasonic Cleaning Tank and Rinse
- Finnsonic Ultrasonic Cleaning Tank

Heat Treatment

- Hardening and Tempering
- Carbolite Lab Oven Max temp 1200 degrees C
- Lab Oven
Max temp 300 degrees C
- Furnace
Max temp 900 degrees C

Electro Plating

- Nickel Plate 0.005-0.015mm
Work Area 160mm (W) x 430mm (L) x 400mm (H)
- Gold Plate 23.5 Ct
Work Area 160mm (W) x 430mm (L) x 400mm (H)
- Rhodium Plate
Work Area 160mm (W) x 430mm (L) x 400mm (H)


- Shot Blasting Guyson Euroblast 4 Various media available
- Graining
- Lapping
(140mm Dia) plus polishing option
- Polishing

General enquiries

Contact info

Phillips House,
Chapel Lane,
West Yorkshire,
HD8 9ST,

Tel: +44 (0) 1924 840 666

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