Replacement Cog Motor Belt (Lower) for Bernina 1000 Series Sewing Machines

Replacement lower cog motor belt designed for select Bernina 1000 series sewing machines (models 1020 and higher). This toothed cog belt transfers power from the motor to the machine's drive system, ensuring smooth, reliable operation of these Bernina models.

Product Specifications

Part Number: 0015285000
Type: 258-2GT cog belt (lower)
Teeth: 129 teeth
Compatibility: Bernina 1000 series models 1020 and higher (see list below)

Compatible Bernina Models

1020, 1030, 1031, 1070, 1080, 1090, 1120, 1130, 1230, 1530, 1630

Key Features

Lower Cog Belt: Specifically the lower cog belt in the drive system
Toothed Design: 129 teeth provide secure engagement and prevent slipping
258-2GT Specification: Proper size and tooth profile for correct fit
Essential Drive Component: Transfers power from motor to machine mechanism
Quality Replacement: Manufactured to meet original specifications for reliable performance

When to Replace Your Cog Motor Belt

Belt is cracked, frayed, or shows visible wear
Teeth are damaged, worn, or missing
Belt has stretched and slips during operation
Machine runs sluggishly or loses power
Belt makes unusual noises during operation
Machine won't run or runs intermittently
As preventive maintenance every few years of regular use

Why Cog Belts Matter

The cog motor belt is a critical component in your Bernina's drive system. Unlike smooth V-belts, cog belts have teeth that mesh with toothed pulleys, providing secure engagement and preventing slipping. This ensures reliable power transfer for needle movement, feed dog operation, and all internal components. A worn or damaged cog belt can cause loss of power or complete machine failure.

IMPORTANT: Bernina 1000 Series Belt System Guide

The Bernina 1000 series uses a two-belt system with ONE upper belt and TWO different lower belt options depending on your model:

Upper Belt (1000 Series Models):

Part #0015275000 (160XL025, 80 teeth) - fits all 1000 series models

Lower Belt - Choose Based on Your Model:

For Models 1000-1015: Part #0023765000 (246X2GT, 123 teeth) - smaller lower belt
For Models 1020-1630: Part #0015285000 (258-2GT, 129 teeth) - this product

How to Choose the Correct Lower Belt: Check your machine's model number. If it's 1020 or higher (1020, 1030, 1031, 1070, 1080, 1090, 1120, 1130, 1230, 1530, 1630), you need this belt (Part #0015285000). If it's 1015 or lower (1000, 1000+, 1001, 1004, 1005, 1006, 1008, 1010, 1011, 1015), you need Part #0023765000.

Installation Tips

Verify your model number to ensure you're ordering the correct lower belt
Check belt tension after installation - should be snug but not overly tight
Inspect pulleys for wear or damage when replacing belt
Ensure teeth properly mesh with pulley grooves
Consider replacing both upper and lower belts together
Keep spare belts on hand for future maintenance

About Bernina 1000 Series Models

The Bernina 1000 series models are well-regarded sewing machines known for their reliable construction and excellent stitch quality. These machines were built to last with proper maintenance. Regular replacement of wear items like motor belts is essential to keep these machines running smoothly and reliably.

Note

This is a quality replacement cog motor belt designed to meet original specifications. This is the lower motor belt for models 1020 and higher - verify your model number before ordering to ensure you get the correct lower belt size. Some mechanical knowledge is helpful for belt replacement.

Bernina Model 1020 Sewing Machine Parts: Original and Replacement

Bernina 3-Prong Power Lead Cord - Replacement 110/120V Cable | Part 329.317.03

Cog Motor Belt (Lower) - Bernina Part #0015285000 - Models 1020-1630

Power Cord Retractable Reel - Bernina Part # 0020577107

Foot Control for Bernina Sewing Machines - 0026417012R