What is the iOptron Pier Top Plate for?

The iOptron Pier Top Plate is a mechanical adapter designed to connect specific iOptron equatorial mount heads, primarily the CEM60 and CEM70, to an iOptron tri-pier or permanent pier. It provides a secure, stable platform for the mount.

Can I use this Pier Top Plate with my iOptron GEM45 mount?

Yes, but it requires modification by the user. The plate is not a direct, bolt-on fit for the GEM45 mount out of the box. You will need access to tools to machine the plate to make it compatible with your setup.

What modifications are needed to fit the Pier Top Plate to a GEM45 and tri-pier?

To attach a GEM45 mount to a tri-pier using this plate, you must drill out the threads in the plate's mounting holes to create a smooth bore. The holes must also be countersunk so that the heads of your mounting bolts sit flush with or below the plate's top surface, allowing the mount to sit flat.

Will this plate fit my iOptron CEM70 mount without any changes?

Yes. This plate is designed as the stock adapter for the CEM70 and CEM60 mounts. It should provide a direct fit to an iOptron pier without any need for machining or modification.

Why does the Pier Top Plate need to be modified for a GEM45?

The issue arises from a mismatch of threaded holes. For some mount and pier combinations, both the plate and the pier it connects to have threaded mounting holes. To properly secure the mount, one set of holes must be a smooth, unthreaded bore to allow the bolt to pass through and tighten correctly.

Is any hardware included with the Pier Top Plate?

No, this product is the plate only. You will need to use the existing hardware that came with your mount and pier to attach it.

iOptron Pier Top Plate for CEM60 & CEM70 Mounts

by iOptron

SKU IOP-8032PT-CEM60

$75.00 - $75.00

$75.00

$75.00 - $75.00

$75.00

Price Match Policy!

CEM60 & CEM70 Compatibility: Pier top plate for iOptron CEM60 and CEM70 equatorial mounts.
Pier Integration: Provides a stable, secure connection between the mount head and an iOptron tri-pier or permanent installation pier.
Solid Construction: Machined from solid metal to prevent flexure and maintain polar alignment accuracy under load.

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iOptron Pier Top Plate for CEM60 & CEM70 Mounts

The iOptron Pier Top Plate (#8032PT-CEM60) mates a CEM60 or CEM70 mount head to an iOptron pier or tri-pier. One customer review (September 2023) reports drilling out the plate's threaded holes to use it with a GEM45 on an iOptron Tri-Pier 360.

Made for iOptron CEM60 & CEM70 Mounts

This Pier Top Plate is iOptron's plate for connecting the CEM60 and CEM70 equatorial mounts to an iOptron permanent pier or tri-pier.

One Customer's GEM45 Setup

One customer reports that all the holes on this plate are threaded, as are the mounting holes on his iOptron Tri-Pier 360. To attach a GEM45, he drilled out the plate's four 8 mm holes to a smooth bore and countersank them so 8 mm flat head bolts sit below the top surface. iOptron does not list the GEM45 for this plate.
What is the iOptron Pier Top Plate for?

The iOptron Pier Top Plate is a mechanical adapter designed to connect specific iOptron equatorial mount heads, primarily the CEM60 and CEM70, to an iOptron tri-pier or permanent pier. It provides a secure, stable platform for the mount.

Can I use this Pier Top Plate with my iOptron GEM45 mount?

iOptron does not list the GEM45 for this plate. One customer reports that he drilled out and countersank the plate's threaded holes to attach a GEM45 to an iOptron Tri-Pier 360.

Will this plate fit my iOptron CEM70 mount without any changes?

This plate is made for the CEM60 and CEM70 mounts. iOptron does not publish fitting details, and dealers note that the CEM70 uses the center post supplied with the mount, so contact us if you are unsure what your pier setup needs.
Fits (Mount / Scope) iOptron CEM60, CEM60EC, CEM70
Pier Top Plate. iOptron does not publish a package list for this item.
iOptron 2-Year Limited Warranty

iOptron Pier Top Plate for CEM60 & CEM70 Mounts