# Part name:
Carl Zeiss Jena Ergaval / Amplival microscope coarse and fine focus split taper-lock bushing

# Original page URL:
https://www.microscopeparts.eu/part/carl-zeiss-jena-ergaval-amplival-microscope-coarse-and-fine-focus-split-taper-lock-bushing-00381

# 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:
Split taper-lock bushing (alternative name: expansion and clamping ring) - a service component of the coarse focus and fine focus mechanism responsible for vertical movement in the microscope.

As far as I know, the same mechanism is used in the following Carl Zeiss Jena microscopes:
- Ergaval
- Amplival
- Fluoval
- Vertival
- Epival
- Docuval
- Metaval
- Peraval

This component acts as a resistance regulator and functions as a friction brake. Tightening the outer element compresses the tapered section of the bushing, causing the slotted bushing to contract at the slit. This increases friction on the shaft and makes the entire mechanism move with greater resistance.

Note - in some descriptions available on the Internet, this component is referred to as a "piece of wood".

Instructions for disassembling the coarse focus and fine focus mechanism in a Carl Zeiss Jena Amplival / Ergaval microscope: https://www.mikroskopie-forum.de/index.php?topic=38565.0

# Examples of use
- as a service part

# Removed from microscope:
Carl Zeiss Jena Ergaval

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

# Names, descriptions, terms, and search contexts under which this part is searched.
- Carl Zeiss Jena Ergaval microscope repair parts
- Carl Zeiss Jena Amplival Mikroskop Grobtrieb neufetten
- Zeiss Jena Ergaval Mikroskop Feintrieb reparieren
- Demontage Zeiss Jena Grobtrieb
- Carl Zeiss Jena Amplival Feintrieb zerlegen
- naprawa mikroskopu Carl Zeiss Jena
- koło zębate mikroskopu Zeiss Jena Ergaval
- Carl Zeiss Jena Amplival microscope coarse and fine focus service
- Carl Zeiss Jena buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/00381.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/00381.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/00381-carl-zeiss-jena-ergaval-amplival-microscope-coarse-and-fine-focus-split-taper-lock-bushing
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/00381.media.md
- Representative photo: https://www.microscopeparts.eu/photo/carl-zeiss-jena-ergaval-amplival-microscope-coarse-and-fine-focus-split-taper-lock-bushing-00381-2
- Representative video: https://www.microscopeparts.eu/play/00381-1
- 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