Imer Saw Lock Knob

Features

• It fits the Combi 200VA, 250VA, 250/1000VA Tile Saws, Mix 60, and Masonry 350 smart cut saws

The Imer Lock Knob is a genuine OEM clamping knob used on IMER tile and masonry saws to securely lock adjustable components—such as guides, guards, and support arms—in place during cutting, ensuring accuracy, stability, and operator safety. Sold under the primary part number 3211381 for combi tile saws (and as 21126MER on some assemblies), this threaded lock knob is a small but essential part of IMER’s adjustment and locking system.

What is the Imer Lock Knob?

Dealers describe the part simply as “Imer Lock Knob – 3211381 Imer Lock Knob for combi tile saws.” It is a plastic or composite knob with a threaded metal insert that screws onto a stud or bolt on IMER saws to clamp movable parts firmly.

Key identifiers:

• Product name: Imer Lock Knob.

• Primary part number: 3211381 – lock knob for combi tile saws.

• Related lock‑knob part: 21126MER Imer USA LOCK KNOB / SAW, used on some Combi 250VA blade guard assemblies.

These lock knobs are used across multiple IMER saw platforms (Combi and masonry saws) wherever a hand‑tightened clamp is needed.

Where the Imer Lock Knob is Used

The Imer Lock Knob 3211381 is specified “for combi tile saws” in Contractors Direct’s catalog. Combi series bridge saws like the Combi 200VA, Combi 250VA, Combi 1000VA, and 250/1500 VA include a variety of adjustable features that rely on locking knobs and plates.

Typical applications for IMER lock knobs include:

• Locking the guide bar or fence that squares the tile to the table, ensuring repeatable straight cuts.

• Securing blade guard components and covers, often referenced in blade‑guard parts diagrams (e.g., 21126MER LOCK KNOB / SAW on Combi 250VA blade guard parts).

• Clamping side tables, support arms, or accessories on the saw frame.

• Locking adjustable stops or depth settings where IMER uses hand knobs instead of hex bolts.

Because IMER standardizes hardware, the same 3211381 lock knob can appear in several locations on different Combi saw models, and 21126MER is similarly used wherever a more specific lock knob is required on saw assemblies.

OEM Part Numbers and Variants

Based on parts listings:

• 3211381 – Imer Lock Knob / Saw (combi tile saws).

  • Contractors Direct: “3211381 Imer Lock Knob for combi tile saws.”

  • Blades Direct: “Imer Lock Knob – SKU: 3211381 – Regular price $7.99.”

  • K2DT IMER parts: “3211381 IMER LOCK KNOB/SAW Genuine OEM Parts – Your Price: $4.74.”

• 21126MER – Imer USA LOCK KNOB / SAW.

  • Appears in the Combi 250VA blade guard parts list as a lock knob used with the guard and bar assemblies.

Both are genuine IMER lock knobs; 3211381 is the common listing for combi tile saw lock knobs, and 21126MER is a more specific lock‑knob reference within certain assemblies.

Function and Benefits of the Lock Knob

The Imer Lock Knob is designed for frequent hand adjustment without tools, delivering:

• Quick, tool‑free clamping – Operators can tighten and loosen the knob by hand when adjusting guides, tables, guards, or support arms.

• Secure lock‑down – The threaded insert and knob profile provide enough clamping force to keep parts from moving under vibration and cutting loads.

• Repeatable settings – By firmly locking guides and stops, the knob helps maintain consistent measurements and straight cuts, as demonstrated in Combi bridge saw reviews where locking mechanisms hold the tile and head steady.

• Safety – Properly tightened lock knobs keep blade guards and movable parts in place, preventing accidental shifts during operation.

The knob’s ergonomic design makes it easy to grip even with wet or gloved hands, which is important on water‑fed tile saws.

Signs You Need a New Imer Lock Knob

You may need to replace an Imer Lock Knob if:

• The knob cracks or breaks, especially if over‑tightened or struck.

• The threaded insert strips or spins, no longer tightening on the stud or bolt.

• The knob is lost during transport or disassembly.

• Clamped parts (fence, guard, table extensions) won’t stay locked even with the knob fully tightened.

Because lock knobs are relatively low‑cost and critical for both accuracy and safety, many contractors keep a few spare 3211381 lock knobs on hand for their IMER saws.

OEM vs Generic Lock Knobs

While generic plastic knobs exist, using the OEM Imer Lock Knob (3211381 / 21126MER) is recommended because:

• Thread compatibility – IMER uses specific metric or UNC threads; OEM knobs match those exactly, reducing the risk of cross‑threading or poor engagement.

• Correct stem length and seat – OEM knobs are sized so the clamping face and washer (if present) align with the saw’s mating surface without bottoming out too early.

• Material and durability – Original IMER knobs are chosen to withstand water, slurry, UV exposure, and jobsite abuse.

• Fit in tight locations – Some knobs sit near guards or rails; OEM knob size and shape ensure they can turn freely without interference.

K2DT and other IMER‑specialist parts vendors clearly mark 3211381 IMER LOCK KNOB/SAW Genuine OEM Parts, emphasizing that these are factory‑spec replacements.