Hilger Watts Theodolite Manual Repack //top\\

Inspect the bearings for scoring. If the bearings are damaged, the precision will be compromised. If they are clean, apply a very thin layer of new synthetic lubricant. 5. Reassembly and Lubrication

This allows you to orient the instrument's zero reference.

Degrease the metal journal bearing surfaces and apply a light instrument grease to the trunnion bearings.

Hilger & Watts emerged from the merger of two distinguished British instrument-making firms. Adam Hilger, Ltd., founded in 1874, was renowned for its expertise in spectroscopy, while Messrs. E. R. Watts and Son, established in 1865, was already a celebrated name in theodolite production through the work of Edwin Richard Watts (1833–1901) and his son George William Watts (c. 1871–1954). On 20 February 1948, these two companies officially merged, forming Hilger & Watts Ltd., a powerhouse in British scientific instrumentation. At its peak, the company employed around 1,300 people across six factories in the South East of England, including facilities in Camberwell, Highbury, and a small factory near Margate and Ramsgate in Kent. hilger watts theodolite manual repack

Locate and remove the main axis retaining nut, typically found beneath the circle housing.

A clear, parallax-free image is essential for accurate readings.

Microptic transit theodolite, 1954 - Science Museum Group Collection Inspect the bearings for scoring

However, owning a vintage Hilger & Watts theodolite (such as the popular ST400 or Microptic MK II) requires careful maintenance. Finding the original manual can be difficult, and the internal lubricants often harden over decades, leading to stiff movements. A —or more commonly, a CLA (Clean, Lubricate, Adjust) procedure—is necessary to return the instrument to its former glory.

Ultra-light damping grease (e.g., Nyogel 774VL or Micro-Lubric 203) for internal optical glass focusing tracks.

To clean and restore the fluid motion of the elevation assembly: Hilger & Watts emerged from the merger of

For the main vertical axis spindle, apply a micro-layer of light instrument oil or low-viscosity dampening grease. Excess grease here will create drag and cause reading errors in cold weather.

Verify that the vertical circle reads exactly 90 or 0 degrees (depending on model configuration) when the telescope is perfectly level.

If the telescope focusing is stiff or gritty, the helical focusing mechanism should be cleaned and lightly lubricated to prevent damage to the optical tube. 3. Preparation and Tools Required

Whether you are restoring a microptic theodolite No. 1, recalibrating a Watts ST‑200 for workshop use, or simply fascinated by the precision of optical instruments, having access to a well‑repacked manual transforms a vintage theodolite from a museum piece into a working tool. The circle‑reading instructions, collimation adjustments, and case‑care details printed decades ago remain as relevant today as they were when a surveyor first opened the case on a hillside in Kent or a mine shaft in Wales. The manual repack is the key that unlocks that continuing utility—and a tribute to the engineering excellence of Hilger & Watts.

Any specific mechanical issues like a or a clouded optical read-out