# Part name:
Lomo MMU-3 / MMY-3 metallurgical microscope fine focus mechanism | gear block

# Original page URL:
https://www.microscopeparts.eu/part/lomo-mmu-3-mmy-3-metallurgical-microscope-fine-focus-mechanism-gear-block-99522

# Part manufacturer:
Lomo

# Full manufacturer name:
Leningrad Optical Mechanical Association

# Other names of this manufacturer:
- LZOS
- TOMP
- WTOMP
- WOOMP
- GOMZ
- LOOMP
- Progres
- Progress
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:
Internal gear mechanism of the fine focus adjustment system (micro adjustment block) for the Lomo MMU-3 / MMY-3 metallurgical microscope.

The function of this mechanism is precise focusing - converting the horizontal movement of the adjustment knob into precise vertical movement.

# Examples of use
- as a service part to replace the entire block
- if you own a Lomo MMU-3 microscope with a damaged fine focus mechanism and want to replace only a single gear wheel
- if you need a fine focus mechanism for your own DIY project

# Removed from microscope:
Lomo MMU-3

# Also compatible with the following microscopes:
Lomo MMU-3

# Names, descriptions, terms, and search contexts under which this part is searched.
- Lomo MMU-3 microscope repair parts
- Lomo MMU-3 / MMY-3 EPI Auflicht Mikroskop Triebblock
- Lomo mmu-3 Mikroskop Feintrieb
- Lomo MMU-3 EPI microscope fine focus
- Lomo MMY-3 microscope micro gear block
- Lomo buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/99522.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/99522.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/99522-lomo-mmu-3-mmy-3-metallurgical-microscope-fine-focus-mechanism-gear-block
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/99522.media.md
- Representative photo: https://www.microscopeparts.eu/photo/lomo-mmu-3-mmy-3-metallurgical-microscope-fine-focus-mechanism-gear-block-99522-2
- Representative video: https://www.microscopeparts.eu/play/99522-1
- Other parts from category Service and spare parts: https://www.microscopeparts.eu/service-and-spare-parts
- More Service and spare parts removed from microscope Lomo MMU-3: https://www.microscopeparts.eu/service-and-spare-parts/from/lomo/mmu-3
- More Service and spare parts compatible with microscope Lomo MMU-3: https://www.microscopeparts.eu/service-and-spare-parts/for/lomo/mmu-3
- More Service and spare parts removed from microscopes Lomo: https://www.microscopeparts.eu/service-and-spare-parts/from/lomo
- More Service and spare parts compatible with microscopes Lomo: https://www.microscopeparts.eu/service-and-spare-parts/for/lomo

# 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