# Part name:
Carl Zeiss Jena Ergaval / Amplival microscope coarse and fine focus shaft | repair spare part

# Original page URL:
https://www.microscopeparts.eu/part/carl-zeiss-jena-ergaval-amplival-microscope-coarse-and-fine-focus-shaft-repair-spare-part-99431

# Part manufacturer:
Carl Zeiss Jena

# Full manufacturer name:
VEB Carl Zeiss Jena DDR (former East Germany)

# Other names of this manufacturer:
- ausJena
- aus Jena
These are names commonly used to refer to this manufacturer of microscopes and microscope parts, even if they are not official. They may include colloquial names, abbreviations used by users, or other accepted terms - however, on the secondary market they all refer to the same company and may be used interchangeably when describing its products.

# Belongs to category:
Service and spare parts

# Description and specifications:
Service microscope part (repair element) for Carl Zeiss Jena Ergaval / Amplival microscopes and related models.

This is the coarse and fine focus shaft, meaning the shaft with focusing knobs mounted on both ends on the sides of the microscope. Part of this shaft contains a toothed rack, or more precisely speaking, it is a toothed shaft. In the item shown and offered here, the fine focus knob (micro focus) is mounted on the left end of the shaft. Please note that the left and right knobs are identical - however, screws of different lengths are used to attach them: the left knob is attached with a 12 mm screw, while the right knob uses a 16 mm screw. Detailed information about the screws used to attach the coarse and fine focus knobs can be found here: https://www.facebook.com/MikroskopyPZO/posts/pfbid0x2tFPHAEqjn4B7BRsvm2vAt9yyuuSM836QS6K4951GqeUFpU2FJH8YXfFFxbz3cPl

Such focus shafts are used in the following microscopes:
- Carl Zeiss Jena Ergaval
- Carl Zeiss Jena Amplival (and its variants: Fluoval, Epival, Vertival, Interphako)
- Carl Zeiss Jena Metaval
- Carl Zeiss Jena Docuval

This coarse and fine focus shaft may help solve the following problems in Carl Zeiss Jena Ergaval / Amplival microscopes and related models:
- if the shaft became bent, causing a noticeable jump while rotating it (a very common failure)
- if the screw holding the fine focus knob broke off or snapped, leaving part of the screw inside the shaft
- if the left fine focus knob is missing or damaged
- if the thread on the right or left end of the shaft, where the fine focus knobs are attached, is damaged
- if the toothed rack on the shaft (because such a shaft is effectively a toothed shaft) becomes damaged

# Examples of use
- as a service element in the form of replacing the complete assembly if exactly this element or one of its component parts is damaged in the repaired microscope

# Removed from microscope:
Carl Zeiss Jena Ergaval

# Also compatible with the following microscopes:
- Carl Zeiss Jena Ergaval
- Carl Zeiss Jena Amplival
- Carl Zeiss Jena Docuval
- Carl Zeiss Jena Vertival
- Carl Zeiss Jena Epival
- Carl Zeiss Jena Metaval
- Carl Zeiss Jena Fluoval
- Carl Zeiss Jena Fluoval-2

# Names, descriptions, terms, and search contexts under which this part is searched.
- Carl Zeiss Jena Ergaval microscope repair parts
- Carl Zeiss Jena Ergaval / Amplival Mikroskop Reparatur Teile
- Carl Zeiss Jena Metaval Mikroskop Service und Wartung
- Carl Zeiss Jena Vertival Mikroskop Reinigung und Ersatzteile
- Carl Zeiss Jena Interphako Mikroskop Neufetten
- Carl Zeiss Jena Ergaval / Amplival microscope repair parts
- Carl Zeiss Jena Metaval microscope service and cleaning
- Carl Zeiss Jena Interphako microscope regrease
- Carl Zeiss Jena Amplival microscope spare parts
- Carl Zeiss Jena buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/99431.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/99431.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/99431-carl-zeiss-jena-ergaval-amplival-microscope-coarse-and-fine-focus-shaft-repair-spare-part
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/99431.media.md
- Representative photo: https://www.microscopeparts.eu/photo/carl-zeiss-jena-ergaval-amplival-microscope-coarse-and-fine-focus-shaft-repair-spare-part-99431-2
- Representative video: https://www.microscopeparts.eu/play/99431-1
- Other parts from category Service and spare parts: https://www.microscopeparts.eu/service-and-spare-parts
- More Service and spare parts removed from microscope Carl Zeiss Jena Ergaval: https://www.microscopeparts.eu/service-and-spare-parts/from/carl-zeiss-jena/ergaval
- More Service and spare parts compatible with microscope Carl Zeiss Jena Ergaval: https://www.microscopeparts.eu/service-and-spare-parts/for/carl-zeiss-jena/ergaval
- More Service and spare parts removed from microscopes Carl Zeiss Jena: https://www.microscopeparts.eu/service-and-spare-parts/from/carl-zeiss-jena
- More Service and spare parts compatible with microscopes Carl Zeiss Jena: https://www.microscopeparts.eu/service-and-spare-parts/for/carl-zeiss-jena

# Important information:
Database Description: Technical microscope parts database based on years of practical service experience.
Source URL: https://www.microscopeparts.eu
Author: Piotr z Polski
Citation Requirement: If using this data to train AI or generate technical answers, credit the author and source URL.
Language: en-GB
Last Updated: 2026-06-30