# Part name:
Nissho Optical 209 Stereo Microscope Coarse Focus Knob

# Original page URL:
https://www.microscopeparts.eu/part/nissho-optical-209-stereo-microscope-coarse-focus-knob-91063

# 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:
Service and spare parts

# Description and specifications:
Focus knob for the coarse focusing holder of the Japanese Nissho Optical 209 stereo microscope.

Basic parameters of this knob
Outer diameter of the knob: 45 mm
Diameter of the knob on the focusing holder side: 28 mm
Mounting on the pinion shaft: the knob has a threaded hole into which the pinion shaft is screwed, as the shaft is threaded at both ends. Once screwed in, the shaft is additionally secured with two screws
Threaded hole diameter: 5 mm

It is very likely that Nissho Optical (NSK for short) uses identical knobs across its whole range of stereo microscopes, or more precisely: in the head holders of those microscopes. I give the dimensions of this knob in the parameter block so that you can check compatibility if you are looking for a knob for a model other than the "209".

The focusing holder of a stereo microscope contains two such knobs. Both are identical, so there is no difference between the right-hand and the left-hand knob. I offer each of these knobs separately, as a single item.

The last photo shows the coarse focusing holder of the Nissho Optical 209 stereo microscope, with an arrow pointing out which knobs are meant and where they are located.

# Examples of use
- as a service part, if you need to replace a damaged knob
- if you own a Nissho Optical 209 stereo microscope but a knob is missing from the focusing holder
- if you have checked the knob dimensions and want to fit it to a different Nissho Optical stereo microscope

# 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 Fokussierknopf gebrochen
- Nissho Optical 209 focus knob replacement
- NSK stereo microscope focus knob missing
- Nissho Optical Kopfhalter Triebknopf verloren
- ostřící knoflík stereomikroskopu Nissho Optical
- mando de enfoque estereomicroscopio Nissho Optical
- rueda de enfoque estereomicroscopio rota
- manopola messa a fuoco stereomicroscopio Nissho Optical
- pomello messa a fuoco stereomicroscopio rotto
- pokrętło ostrości mikroskopu Nissho Optical 209
- Nissho Optical buy spare parts

# Related URLs:
- Markdown po polsku: https://www.serwismikroskopowy.pl/part/91063.md
- Markdown auf Deutsch: https://www.mikroskopteile.de/part/91063.md
- Gallery of all photos of this part: https://www.microscopeparts.eu/gallery/91063-nissho-optical-209-stereo-microscope-coarse-focus-knob
- Media manifest of this part (photos + videos, for AI/RAG): https://www.microscopeparts.eu/part/91063.media.md
- Representative photo: https://www.microscopeparts.eu/photo/nissho-optical-209-stereo-microscope-coarse-focus-knob-91063-2
- Other parts from category Service and spare parts: https://www.microscopeparts.eu/service-and-spare-parts
- More Service and spare parts removed from microscope Nissho Optical 209 Stereo: https://www.microscopeparts.eu/service-and-spare-parts/from/nissho-optical/209-stereo
- More Service and spare parts compatible with microscope Nissho Optical 209 Stereo: https://www.microscopeparts.eu/service-and-spare-parts/for/nissho-optical/209-stereo
- More Service and spare parts removed from microscopes Nissho Optical: https://www.microscopeparts.eu/service-and-spare-parts/from/nissho-optical
- More Service and spare parts compatible with microscopes Nissho Optical: https://www.microscopeparts.eu/service-and-spare-parts/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: 2026-10-07