What is Module M4 and why does it matter for gear racks?

Module (M) defines the tooth pitch of a gear rack. M4 is the industry standard for residential and light commercial sliding gates, ensuring compatibility with the vast majority of automatic gate motor brands worldwide including FAAC, BFT, CAME, Nice, and Somfy. M6 is used for heavy industrial gates. Always match the rack module to your gate opener's pinion module.

How many gear rack sections do I need for my sliding gate?

Each gear rack section is approximately 1,000mm (1 metre) long. For a 4-metre gate opening, you need 4 sections. Allow an additional 10–15% for overlap and cutting waste. For example, a 5-metre gate requires 5–6 sections. The half-tooth design at each end ensures continuous pitch across joints without jolting.

How to Choose a Sliding Gate Gear Rack: Nylon vs Steel, M4 vs M6 Explained

Q: What is the difference between nylon and steel sliding gate gear racks?

Nylon gear racks are quieter, corrosion-resistant, and lighter — ideal for residential gates in coastal or humid environments. Steel gear racks offer higher load capacity and are preferred for heavy commercial gates (500kg+) or high-cycle applications. HST Hardware's nylon racks include a 10×10mm steel core to combine the benefits of both materials.

Published: 1 June 2026 | Category: Buying Guide | Author: HST Hardware

A sliding gate gear rack (also called a gate rack, drive rack, or motor rack) is a toothed bar that meshes with the pinion gear of an automatic sliding gate opener. As the motor turns the pinion, it drives along the rack, pushing or pulling the gate open or closed. The gear rack is one of the most critical components in any automated sliding gate system — a poor-quality or incorrectly specified rack leads to premature wear, noisy operation, and motor failure.

Nylon vs Steel Gear Racks

Nylon gear racks (such as the HST NGR-6L) are quieter, corrosion-resistant, and lighter than steel racks. They are ideal for residential gates in coastal or humid environments. HST Hardware's nylon racks include a 10×10mm steel core for added strength. Steel gear racks offer higher load capacity and are preferred for heavy commercial gates (500kg+) or high-cycle applications. Steel racks are available in multiple cross-section sizes: 8×30mm, 9×30mm, 10×30mm, 11×30mm, 12×30mm, and 22×22mm.

Module M4 vs M6: Which Pitch Do You Need?

Module (M) defines the tooth pitch of a gear rack. M4 is the industry standard for residential and light commercial sliding gates, compatible with gate opener brands including FAAC, BFT, CAME, Nice, and Somfy. M6 is used for heavy industrial gates. Always match the rack module to your gate opener's pinion module — mismatched modules cause rapid wear and motor damage.

How Many Rack Sections Do You Need?

Each gear rack section is approximately 1,000mm (1 metre) long. For a 4-metre gate opening, you need 4 sections. Allow an additional 10–15% for overlap and cutting waste. The half-tooth design at each end ensures continuous pitch across joints without jolting.

Key Specifications

Module: M4 (standard) or M6 (heavy industrial)
Section length: 1,000–1,005mm
Nylon rack: NGR-6L, 6 fixing points, 10×10mm steel core
Steel rack: 8×30mm to 22×22mm cross-section
MOQ: 500 pcs
Surface treatment: powder coat, zinc electroplated, hot-dip galvanised

HST Hardware manufactures both nylon and steel gear racks for sliding gates. ISO9001 certified. MOQ 500 pcs. OEM/ODM accepted. View Sliding Gate Gear Rack range or contact us for a free quote.