Nortek 2100-388 5 5/8" Bore Replacement Pulley

Overview

The Nortek 2100-388 is a replacement pulley sized for a 5 5/8-inch bore, identified by Nortek under part number 2100-388 (also searched as 2100 388). This part has been marked discontinued by the manufacturer, which means it is no longer in active production and remaining inventory is finite. If your system calls out this exact part number, verify the bore dimension and mounting fit against your existing hardware before ordering, since replacement pulleys are not universally interchangeable across gate operator and door operator platforms.

Key Features

• 5 5/8-inch bore: matches shaft hardware sized to that exact diameter — confirm your shaft measurement before purchase, since a mismatched bore means the pulley won't seat or turn correctly.
• Genuine Nortek part number 2100-388: sourcing the exact manufacturer part number reduces the risk of fit or load-rating mismatches that come with generic aftermarket substitutes.
• Discontinued status: once current stock is gone, this exact part number will not be replenished from the manufacturer — plan spares accordingly if this pulley is part of a maintenance-critical system.

Integration & Compatibility

Because detailed compatibility data for the 2100-388 is not available here, confirm fit against your specific Nortek-brand equipment (or the equipment manual that references this part number) before installing. Matching the bore size alone does not guarantee compatibility with every shaft length, keyway configuration, or belt/chain pitch used across different equipment generations.

Frequently Asked Questions

Q: Is the Nortek 2100-388 still in production?

A: No. The 2100-388 is discontinued by the manufacturer. Available stock is limited to remaining inventory and will not be restocked once sold out.

Q: What bore size does the 2100-388 pulley use?

A: It is sized for a 5 5/8-inch bore. Measure your existing shaft or pulley before ordering to confirm fit.

Q: Can I substitute a different pulley if the 2100-388 is out of stock?

A: Possibly, but bore size alone doesn't guarantee compatibility — check keyway, shaft length, and belt or chain pitch against your equipment's documentation first.

Marty Allison

The 2100-388 is a straightforward part on paper — a 5 5/8-inch bore pulley from Nortek — but the detail that actually matters here is its discontinued status, not the bore spec.

Technical Highlights:

• 5 5/8" bore: this is the one hard number Nortek publishes for the 2100-388 — measure twice against your existing shaft before you order, since there's no published tolerance or adapter data to fall back on.
• Discontinued (EOL) status: once the remaining 2100-388 inventory sells through, Nortek isn't cutting a new production run — treat available stock as a one-shot spares opportunity, not a recurring SKU.
• Single-part-number identification: ordering by the exact 2100-388 part number is the safest way to avoid a bore or keyway mismatch versus guessing at a generic aftermarket pulley.

Deployment Considerations:

• Because this part is EOL, lead time on a future restock isn't a fallback plan — if it's a critical spare for an active install, buy the quantity you'll need now.
• No published compatibility list is available for the 2100-388 beyond the bore dimension, so cross-check keyway and shaft length against your equipment manual before installing.

Good fit for a facilities or integration team holding a legacy Nortek-driven gate or door system that specifically calls out the 2100-388 and needs a like-for-like replacement before the part disappears from availability entirely.