# Part name:
Nissho Optical 209 Stereo microscope focusing holder with 50mm head collar and 24mm pillar mount

# Original page URL:
https://www.microscopeparts.eu/part/nissho-optical-209-stereo-microscope-focusing-holder-with-50mm-head-collar-and-24mm-pillar-mount-91077

# Part manufacturer:
Nissho Optical

# Full manufacturer name:
Nissho Optical Co., Ltd., Japan

# Other names of this manufacturer:
NSK
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:
Stands

# Description and specifications:
Focusing holder for the Japanese Nissho Optical 209 stereo microscope.

This is a complete head holder, consisting of:
- collar that the stereo microscope head is inserted into (in this model it is in fact the objective that goes in there)
- clamping screw that holds the microscope in the collar
- rack along which the microscope moves up and down inside the collar (also available separately https://www.microscopeparts.eu/part/91079)
- knobs that produce this movement, that is the focusing knobs (also available separately https://www.microscopeparts.eu/part/91063)
- internal shaft with a pinion that converts the rotary movement into vertical movement along the rack (also available separately https://www.microscopeparts.eu/part/91064)
- mounting block with a hole for fitting it onto the stand pillar
- inside the hole there is a split clamping sleeve with a screw driven in from the outside, locking the whole holder at the required height (also available separately)

Basic parameters of this holder:
Inner diameter of the collar: 50 mm (yes - 50 mm is not a mistake, this diameter is not commonly used on the market)
Diameter of the hole for the stand pillar: 24 mm (yes - 24 mm. This is not a measuring error)

Since these are unusual dimensions and you may suspect a measuring error, the gallery contains photos taken with a caliper as well as a photo of the stand pillar. The pillar is not part of this offer, but I do have it - if you need it, that is no problem :)

It is very likely that Nissho Optical (NSK for short) uses identical holders across the whole series of stereo microscopes it manufactured.

# Examples of use
- if you own a Nissho Optical 209 stereo microscope but the original holder is missing

# Removed from microscope:
Nissho Optical 209 Stereo

# Also compatible with the following microscopes:
Nissho Optical 209 Stereo

# Names, descriptions, terms, and search contexts under which this part is searched.
- Nissho Optical 209 Stereo microscope repair parts
- Nissho Optical 209 Kopfhalter mit Fokussiertrieb
- NSK 209 Stereomikroskop Kopfhalter
- Nissho 209 focusing holder for stereo microscope
- NSK 209 microscope head holder replacement
- Nissho Optical 209 Haltering 50mm Innendurchmesser
- stereo microscope focus block 50mm collar
- Fokussiertrieb für 24mm Stativsäule
- focusing holder for 24mm pillar mount
- NSK Japan Stereomikroskop Ersatzteile
- Zahnstange und Ritzel für Nissho Optical 209
- rack and pinion focus mechanism for stereo microscope
- NSK 209 Fokussiertrieb wackelt
- Kopfhalter Nissho 209 verloren
- Nissho Optical 209 focus knob slipping
- stereo microscope holder missing from stand
- NSK 209 Stereomikroskop restaurieren
- restoring a Nissho Optical stereo microscope
- držák hlavy stereomikroskopu s hrubým zaostřováním
- soporte de cabezal para microscopio estereoscopico
- enfoque de cremallera para microscopio estereoscopico
- supporto testa per microscopio stereoscopico
- messa a fuoco a cremagliera per stereomicroscopio
- uchwyt głowicy mikroskopu stereoskopowego z regulacją ostrości
- Nissho Optical buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/91077.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/91077.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/91077-nissho-optical-209-stereo-microscope-focusing-holder-with-50mm-head-collar-and-24mm-pillar-mount
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/91077.media.md
- Representative photo: https://www.microscopeparts.eu/photo/nissho-optical-209-stereo-microscope-focusing-holder-with-50mm-head-collar-and-24mm-pillar-mount-91077-2
- Representative video: https://www.microscopeparts.eu/play/91077-1
- Other parts from category Stands: https://www.microscopeparts.eu/stands
- More Stands removed from microscope Nissho Optical 209 Stereo: https://www.microscopeparts.eu/stands/from/nissho-optical/209-stereo
- More Stands compatible with microscope Nissho Optical 209 Stereo: https://www.microscopeparts.eu/stands/for/nissho-optical/209-stereo
- More Stands removed from microscopes Nissho Optical: https://www.microscopeparts.eu/stands/from/nissho-optical
- More Stands compatible with microscopes Nissho Optical: https://www.microscopeparts.eu/stands/for/nissho-optical

# 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: 2026-10-24