Home page of the microscope service parts, repair and spare parts online catalog - Sermik-Oplatek Mikroskopservice Dresden f.n.n.Z

Description of this part for the microscope.

based on the N-117M / DN-117M models.

The N-117M / DN-117M is a reasonably good laboratory microscope manufactured in a Chinese NYO factory and sold worldwide under various names. These microscopes are known and sold, among others, as:
- Delta Optical Genetic Pro (mainly in Poland)
- AmScope B340 / T340 (mainly in the USA and the rest of the world through Amazon)
- Labtron LEM-C10 / C11 / C12 (mainly in the United Kingdom)
- Sigeta MB-207 (mainly in Ukraine)
- Boeco Germany BM-117 (mainly in Germany)
- BestScope BS-2020 (mainly in the USA, shipped worldwide)
- Brunel N117M (mainly in the United Kingdom)
- Apex N-117M (mainly in the United Kingdom)
- Surgifield SM-DN-117M (mainly in Nigeria and West Africa)
- Eurotech DN-117M (mainly in Peru)
- Biocare DN-117M (mainly in Peru)
- Viresa N-117M (mainly in Mexico)
- Eurolab DN-117M
- Nexcope N-117M
- Novel N-117M

This is certainly not a complete list – many sellers give their microscopes their own names, just as Delta Optical does in Poland. The best way to check whether this screw fits your microscope is to compare the appearance of your microscope with the microscope from which this screw was removed (https://www.microscopeparts.eu/microscope/optical-n-117m-388).

The N-117M version has a binocular or trinocular microscope head, while the DN-117M model has a built-in digital USB camera (hence the "D" at the beginning of the name, standing for "Digital") – however, the head mounting screw is the same in both cases.

Replacing the head mounting screw may be necessary, for example, when:
- the screw is missing from the microscope, which is common with used microscopes
- the screw in the microscope is bent or broken, which often happens when the microscope is not properly secured for transport
- the screw in the microscope is in poor condition, e.g. damaged because someone tried to force it out with pliers

Description of this part for the microscope.

removed from a Zeiss Standard GFL microscope, but it also fits condenser holders used, among others, in the following microscopes:
- Zeiss Standard 14 / 16 / 18
- Zeiss Standard WL / WL 89
- Zeiss Universal
- Zeiss Photomicroscope (Zeiss PM / Phomi – all models)
- Zeiss Ultraphot

In these microscope models, the condenser has a dovetail mounting ring. This dovetail includes a notch into which the spring-loaded screw presented here engages. You can see what this mounting ring looks like and how the notch is shaped in the photo gallery of item No. 99625 in this database.

Description of this part for the microscope.

screw was removed from a Olympus CH microscope, but it will most likely fit most models of the CH series, for example:
- Olympus CHK
- Olympus CHB
- Olympus CK2
- Olympus CH
- Olympus CH-2

Description of this part for the microscope.

illuminator housing.

This particular mounting screw was part of a fluorescence illuminator installed on a Nikon Optiphot microscope. Hg 100W / HBO 100W fluorescence illuminators, as well as similar versions with the same mechanical design, were used in, among others, the following microscopes:
- Nikon Optiphot
- Nikon Labophot
- Nikon Microphot
- and the EPI fluorescence illuminators used with these microscopes

This mounting screw is frequently exposed to damage because it protrudes beyond the outline of the illuminator housing. As a result, it is often bent or even broken, especially during transport.

Important: Nikon EPI fluorescence illuminators from that period were manufactured with several different lamp house designs. They are most commonly referred to simply as:
- Nikon Hg 100W
- Nikon HBO 100W
- Nikon HBO 100W HG Lamp House
- often the model is Nikon LH-M100CB-1

For verification, the photo gallery includes the exact dimensions of this mounting screw. The last photograph also shows the complete fluorescence illuminator from which it was removed, making it possible to confirm compatibility with complete confidence.

Description of this part for the microscope.

particular screw was removed from a Zeiss Standard 14 microscope, but it will most likely fit most models of the Standard series, for example:
- Zeiss Standard GFL
- Zeiss Standard 16
- Zeiss Standard WL 89
- Zeiss Standard Universal
- Zeiss Standard Photomicroscope
- Zeiss Ultraphot

Note - over the years, Zeiss microscopes (or the same microscopes sold under the Zeiss-Winkel name or under the Opton brand), especially simpler models such as the Zeiss Standard Junior, used different types of head-centering screws. These were not necessarily this type - in some cases ordinary threaded clamping screws were used instead.

Before deciding to replace the screw in a microscope, it is best to carefully compare its appearance and dimensions with the photographs in the gallery or ask a question on the forum https://www.mikroskopie-forum.de/

In the last photos in the gallery, I use arrows to show exactly which microscope component is being offered and where it is in the microscope located .

Description of this part for the microscope.

This particular screw was removed from a Zeiss Standard 14 microscope, but it will most likely fit most models of the Standard series, for example:
- Zeiss Standard GFL
- Zeiss Standard 16
- Zeiss Standard WL 89
- Zeiss Standard Universal
- Zeiss Standard Photomicroscope
- Zeiss Ultraphot

Note - over the years, Zeiss microscopes (or the same microscopes sold under the Zeiss-Winkel name or under the Opton brand), especially simpler models such as the Zeiss Standard Junior, used different types of head-retaining screws. These were not necessarily spring-loaded screws - in some cases ordinary threaded clamping screws were used instead.

Before deciding to replace the screw in a microscope, it is best to carefully compare its appearance and dimensions with the photographs in the gallery or ask a question on the forum https://www.mikroskopie-forum.de/

Description of this part for the microscope.

screw also fits microscope cross-stage attachments used in microscopes such as:
- Carl Zeiss Jena Laboval
- Carl Zeiss Jena Eduval

In the photo gallery there are detailed photos of this element together with the dimensions. Additionally, in the last photo an arrow indicates which element is being referred to and where it is located in the microscope head, in order to clearly identify this part.

Description of this part for the microscope.

Lumipan
- Carl Zeiss Jena Nf
- Carl Zeiss Jena NU / NU2

does NOT fit the gray pancratic condenser used in the Carl Zeiss Jena Amplival microscope.

In the photo gallery detailed photos of this element together with the dimensions are available. Additionally, in the last photo an arrow indicates which element it is and where it is located in the condenser in order to clearly identify this part.

Description of this part for the microscope.

the photo gallery there are detailed photos of this element together with the dimensions. Additionally, in the last photo an arrow indicates which element is being referred to and where it is located in the microscope head, in order to clearly identify this part.

Description of this part for the microscope.

also fits other turret condensers made by Carl Zeiss Jena, because in the vast majority of cases different models differ only in the mounting and optics - the internal mechanics and construction are otherwise the same.

In the photo gallery detailed photos of this element together with the dimensions are available. Additionally, in the last photo an arrow indicates which element it is and where it is located in the condenser in order to clearly identify this part.

Description of this part for the microscope.

other turret condensers made by Carl Zeiss Jena, because in the vast majority of cases different models differ only in the mounting and optics - the internal mechanics and construction are otherwise the same.

In the photo gallery detailed photos of this element together with the dimensions are available. Additionally, in the last photo an arrow indicates which element it is and where it is located in the condenser in order to clearly identify this part.

Description of this part for the microscope.

screw also fits microscope stages with the handle pointing down, which were used in microscopes:
- Carl Zeiss Jena Amplival / Metaval (long handle)
- Carl Zeiss Jena Ergaval (short handle).

In the photo gallery there are detailed photos of this element together with the dimensions. Additionally, in the last photo an arrow indicates which element is being referred to and where it is located in the microscope head, in order to clearly identify this part.

Description of this part for the microscope.

Ergaval microscope has two centering screws. The offer concerns a single centering screw.

The last photo in the gallery clearly shows with an arrow which element is being offered.

Description of this part for the microscope.

is being offered.

Fits among others the following Carl Zeiss Jena microscope models:
- Lumipan
- Lg
- Lr
- Lu

Note - production of the L-Stativ series microscopes began before World War II and continued into the 1950s. Over the years, small design details changed, including the method of mounting the microscope head.
- the earliest models had a threaded microscope head, and there was no fixing screw at all
- the latest models already featured an advanced mounting system with a spring screw (you can see it in the database under number 00659)

Description of this part for the microscope.

The last photo shows which element is being offered.

Fits among others the following Carl Zeiss Jena microscope models:
- Lumipan
- Lg
- Lr
- Lu

Note - production of the L-Stativ series microscopes began before World War II and continued into the 1950s. Over the years, small design details changed, including the method of mounting the microscope stage. Microscope models that have a non-removable stage (screwed to the stand) do not have and do not need such a spring screw.

Description of this part for the microscope.

4 mo2 condenser holder that was used in the Carl Zeiss Jena Ergaval microscope. The same condenser (but with a different lower lens) is used in an identical holder in Fluoval microscopes. Condenser holders with such screws can also be found in the following microscopes:
- Docuval
- Amplival
- NU-2

The purpose of this spring screw is to push the clamp in which the condenser is mounted outward. Thanks to the spring integrated in the screw, it is possible to center the condenser using long centering screws (you can find such a centering screw in the database under number 99132).

In the last photo, an arrow clearly indicates which screw is meant and where it is mounted in the condenser holder.

Description of this part for the microscope.

that was used in the Carl Zeiss Jena Ergaval microscope. The same condenser (but with a different lower lens) is used in an identical holder in Fluoval microscopes. Condenser holders with such screws can also be found in the following microscopes:
- Docuval
- Amplival
- NU-2

In the last photo, an arrow clearly indicates which screw is meant and where it is mounted in the condenser holder.

Description of this part for the microscope.

This mounting screw fits most Carl Zeiss Jena microscopes of the CF250 series:
- Jenamed
- Jenaval
- Jenalumar
- Jenapol
- Jenatech
- Jenavert

Carl Zeiss Jena developed a complete modular microscope system based on connections using this type of screw. Therefore, this screw as a service part is also compatible with most accessories, modules and microscope elements that can be mounted to the microscope, including:
- magnification changers
- VIS analyzers
- trinocular heads
- Interphako heads

Important - carefully check the shape and dimensions of the screw to make sure it is the size you need. For example, the modular design of the Carl Zeiss Jena Amplival microscope is based on mounting screws of a different shape and size (search for it in this database to have a comparison).

Description of this part for the microscope.

the microscope arm
- and a mounting screw

The mounting screw itself - as a separate component - fits practically most Carl Zeiss Jena microscopes based on the Amplival system:
- Amplival
- Amplival Interphako
- Amplival Pol
- Vertival
- Peraval
- Fluoval
- Docuval

Carl Zeiss Jena developed a complete modular microscope system based on connections made with this type of screw. Thanks to this design, the screw as a service part is also compatible with most accessories, modules and components that can be mounted to the microscope, including:
- EPI arms
- Parktaric Zoom Tube module
- Interphako heads

Important - carefully check the shape and dimensions of the screw to make sure it is the size you need. For example, the modular design of the Carl Zeiss Jena Jenamed microscope is based on mounting screws of a different shape and size (search for it in this database for comparison).

Description of this part for the microscope.

two for each condenser. This offer is for a single centering screw.

Description of this part for the microscope.

Description of this part for the microscope.

Ergaval
- Amplival
- Docuval
- Metaval
- Epival
- Vertival
- Nf
- NU
- Epityp
- Epignost

Also for Carl Zeiss Jena devices and accessories such as:
- Winkeltube
- Pankratik Zoom-System
- Interphako
- and many others.

Note - some models have different dimensions for these screws, for example, longer ones.

Note - older models of the Carl Zeiss Jena Lg microscope use a different screw.

Note - the small screw at the front of this part unscrews in the OPPOSITE direction than most screws, and this is the most common cause of damage.

Description of this part for the microscope.

Ergaval
- Amplival
- Docuval
- Metaval
- Epival
- Vertival
- Nf
- NU

Note: Please examine the photos carefully. If I have more than one of this part, some of the screws may show traces of improper (forceful) unscrewing. These are not major traces - mostly minor scratches. Of course, they do not affect the functionality of the element at all.

Note - some models have different screw dimensions, for example, longer ones.

Note - in microscopes with a centering stage holder (for polarizing stages), this screw may be different.

Note - the small screw at the front of this part unscrews in the OPPOSITE direction than most screws, and this is the most common cause of damage.

Description of this part for the microscope.

Of course, an electric illuminator is often inserted in this location instead of a mirror.

Description of this part for the microscope.

the microscope to be tilted at various angles.