Imer Locknut, 2223923

Features

• Spare locknut fits combi 200 and 250 saws, masonry 350 smart cut saws, small 50 pump, Mortarman 120 mixer, silent 300 concrete pump.

The Imer Locknut, 2223923 is a genuine OEM self‑locking nut used across multiple IMER machines to secure critical rotating and structural components, helping prevent loosening under vibration and keeping saws, pumps, and mixers running safely and reliably. This locknut is widely used on popular IMER equipment such as Combi 200 and Combi 250 tile saws, Masonry 350 Smart Cut saws, the Mighty Small 50 pump, and Mortarman 120 mixers, making it one of the most common small replacement parts in the IMER lineup.

What Is the Imer Locknut 2223923?

The Imer Locknut, 2223923 (also listed as 2223923 Imer USA Lock Nut EA) is a self‑locking M8 nut used as a repair and replacement part on various IMER machines. It’s designed to stay tight under continual vibration, which is essential on high‑RPM saw arbors, vibrating pumps, and gear‑driven mixers.

Contractors Direct and other retailers describe it as:

• “Imer Locknut, 2223923 – spare locknut fits Combi 200 and 250 saws, Masonry 350 Smart Cut saws, Small 50 pump, Mortarman 120 mixer, …”

The IMER USA parts documentation lists 2223923 specifically as a “SELF LOCKING NUT M8 Z”, confirming its size and role as a vibration‑resistant fastener.

Where the 2223923 Locknut Is Used (Supported Models)

One reason the Imer Locknut 2223923 is so popular is that it appears on multiple IMER product families.

Retail descriptions highlight that this locknut fits:

• IMER Combi 200 tile saws – overhead rail wet saw for 8" blades.

• IMER Combi 250 tile & stone saws – 10" bridge saws such as Combi 250 VA.

• IMER Masonry 350 Smart Cut saws – masonry block and stone saws.

• IMER Mighty Small 50 pump – Small 50 pumping/spraying machines use this locknut in various subassemblies.

• IMER Mortarman 120 mixer / MIX 120 Plus – vertical shaft mortar mixers use the 2223923 self‑locking nut in their structure and transmission subassemblies.

IME R parts schematics (for example, the Mortarman 360A / Workman mixers parts list) show 2223923 labelled as a self‑locking nut M8 used in structural and mechanical assemblies, confirming its general purpose across several machines.

Because of this cross‑compatibility, many distributors stock 2223923 as a standard IMER small part that fits “many IMER products,” especially saws, mixers, and pumps that share common hardware standards.

Technical Details and Specifications

While the locknut is a small component, the IMER parts list provides key technical details.

From IMER documentation and parts references:

• Part number: 2223923.

• Type: Self‑locking nut (locknut).

• Thread size: M8 (metric 8 mm).

• Finish: Often denoted with a “Z” suffix (M8 Z), indicating a zinc‑plated or zinc‑coated finish for corrosion resistance.

• Function: Provides a secure, vibration‑resistant fastening for rotating parts, frames, brackets, and safety covers on IMER equipment.

IME R Parts describes it as a “crucial component for the proper functioning of your equipment”, emphasizing that it ensures a secure and stable connection and helps prevent malfunctions or accidents resulting from loose hardware.

Why Self‑Locking Nuts Are Critical on IMER Equipment

Machines like tile saws, mortar mixers, and pumps generate continuous vibration and shock loads. Regular nuts can loosen over time, but self‑locking nuts like the Imer 2223923 are engineered to stay tight.

On IMER equipment, the 2223923 locknut is typically used to:

• Secure blade guards, flanges, and brackets on Combi saws so that safety guards stay in place around the spinning blade.

• Lock structural and drive components on Mortarman mixers where vibration and torque are constant.

• Fasten frames, handles, and mounts on Small 50 pumps and similar machines.

Using the proper self‑locking nut helps maintain:

• Operator safety – guards and structural parts stay securely attached.

• Machine reliability – assemblies stay aligned and tight, avoiding premature wear.

• Reduced maintenance – fewer retightening cycles during heavy use.

That’s why IMER and its distributors recommend this OEM locknut instead of generic nuts in critical locations.

OEM vs Generic Locknuts

The 2223923 Imer Locknut is an OEM‑specified fastener, and IMER parts suppliers highlight its quality and fit as reasons to choose it over generic hardware.

From IMER Parts’ product description:

• The locknut is “made with high‑quality materials” and designed to ensure a secure and stable connection.

• It is presented as a long‑lasting solution that helps prevent potential malfunctions or accidents.

• The part is precision‑engineered to fit IMER machines, making installation easier and more reliable than with off‑the‑shelf alternatives.

Generic M8 locknuts may not match IMER’s required thread tolerance, height, or locking characteristics, which can lead to:

• Inadequate clamping force.

• Premature loosening under vibration.

• Interference with nearby parts due to incorrect nut height or width.

For small but safety‑critical parts like blade guard screws, mixer frames, or pump mounts, using the OEM 2223923 nut helps ensure compliance with the machine’s original design.

Typical Replacement Scenarios

Although locknuts are durable, there are several common situations where you should replace the Imer 2223923 Locknut instead of reusing it:

• After disassembly of critical assemblies such as blade guard mounts, mixer legs, or pump supports.

• When a locknut has been over‑tightened, stripped, or cross‑threaded.

• If the nylon or mechanical locking feature appears worn, melted, or no longer resists loosening.

• If the nut shows signs of corrosion or damage from slurry, chemicals, or impact.

IME R Parts notes that replacing worn nuts with the 2223923 locknut is a “smart investment for maintaining the efficiency and safety of your equipment.”

Contractors often keep several 2223923 nuts in stock so they’re available whenever they service saws, mixers, or pumps that use this fastener.

How to Confirm 2223923 Is the Correct Part

Because IMER uses multiple locknut sizes (such as 2223924 M6 and 2223929 M12 in other machines), it’s important to verify that 2223923 is the correct nut for your location.

You can confirm by:

1. Checking the parts manual for your specific model (Combi 200, Combi 250, Masonry 350, Small 50, Mortarman 120, etc.) and looking up the exploded view.

2. Finding the callout for the nut in the parts table; for example, IMER parts lists show “2223923 SELF LOCKING NUT M8 Z” in various assemblies.

3. Matching the thread size (M8) and usage (e.g., guard bracket, frame mount) before ordering.

Retail product pages typically note that 2223923 is the correct locknut for the models listed, which include Combi 200, Combi 250, Masonry 350 Smart Cut, Small 50, and Mortarman 120.