# Part name:
PZO MB-30 / PZO ML microscope coarse focusing block with knobs

# Original page URL:
https://www.microscopeparts.eu/part/pzo-mb-30-pzo-ml-microscope-coarse-focusing-block-with-knobs-00037

# Part manufacturer:
PZO

# Full manufacturer name:
Polskie Zaklady Optyczne

# Other names of this manufacturer:
- PZO Warszawa
- PZO Poland
- PZO Warszawa Poland
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:
Focusing blocks

# Description and specifications:
Focusing block for PZO microscopes:
- MB 30
- MB 30S
- ML 4
- ML 5
- ML 6

NOTE - IMPORTANT - This block does not include a fine (micro) feed mechanism. This block only includes a coarse (macro) feed mechanism.
More specifically, if such a block were complete, it would also include a fine (micro) feed module. This module is simply not included in the unit offered here. Therefore, it is an attractive component for those looking to repair a coarse (macro) feed.

- Black focusing block
- Coarse (macro) feed gear system
- Coarse (macro) feed knobs
- Coaxial fine (micro) feed knobs
- Tension adjustment mechanism

The tension adjustment mechanism is a very important component of a microscope. The PZO MB-30 and ML series microscopes move the entire column (the entire arm) up and down, and this resistance adjustment mechanism prevents the arm from lowering itself if additional components are installed, such as a DIC head or a camera on a trinocular head (as they constitute additional weight).

If you need a precise (micro) movement mechanism, which is missing here, if you need a complete focusing block, or if you need individual components from this block (e.g., a single gear or just the knobs), please <a href="mailto:info@microscopeparts.eu">contact us</a>

# Examples of use
- as a service part to replace the macro mechanism
- if you only need individual gears
- if you only need knobs
- if you need a stop mechanism, as the knob used to adjust it breaks very often

# Removed from microscope:
PZO MB-30

# Also compatible with the following microscopes:
- PZO MB-30
- PZO ML4
- PZO ML5
- PZO ML6
- PZO MB 30S

# Names, descriptions, terms, and search contexts under which this part is searched.
- PZO MB-30 microscope repair parts
- PZO MB-30 mikroskop
- microscope
- focusing block
- blok fokusujący
- mechanizm makro
- mechanizm mikro
- pokrętła
- gałki
- ruch zgrubny
- ruch precyzyjny
- fine focus
- coarse focus
- feintrieb
- grobtrieb
- focus block
- fokus blok
- MB30
- MB 30
- ML4 ML5 ML6 ML 4 ML 5 ML 6 ML-4 ML-5 ML-6 MB-30
- PZO buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/00037.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/00037.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/00037-pzo-mb-30-pzo-ml-microscope-coarse-focusing-block-with-knobs
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/00037.media.md
- Representative photo: https://www.microscopeparts.eu/photo/pzo-mb-30-pzo-ml-microscope-coarse-focusing-block-with-knobs-00037-2
- Other parts from category Focusing blocks: https://www.microscopeparts.eu/focusing-blocks
- More Focusing blocks removed from microscope PZO MB-30: https://www.microscopeparts.eu/focusing-blocks/from/pzo/mb-30
- More Focusing blocks compatible with microscope PZO MB-30: https://www.microscopeparts.eu/focusing-blocks/for/pzo/mb-30
- More Focusing blocks removed from microscopes PZO: https://www.microscopeparts.eu/focusing-blocks/from/pzo
- More Focusing blocks compatible with microscopes PZO: https://www.microscopeparts.eu/focusing-blocks/for/pzo

# 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