• Skip to main content
  • Skip to primary sidebar
  • Skip to footer
  • Home
  • About
  • Forum
  • Design Studio
  • Upholstery Jobs
  • Newsletter
  • Sponsors

The Hog Ring

Auto Upholstery Community

  • Facebook
  • Instagram
  • Twitter

This is How Seat Belt Pretensioners Work

October 24, 2016 By Naseem Muaddi

Auto Upholstery - The Hog Ring - Pyrotechnic Seat Belt Pretensioner

Every auto upholsterer has seen a pretensioner, that bulky mechanical component attached to the end of a seat belt buckle. But how many actually know what it is or how it works?

YouTube stars The Slow Mo Guys recently triggered one on camera and slowed the footage to 28,000 frames per second so we could see it in action.

A pretensioner, of course, is the locking mechanism that instantly tightens a seat belt. In the event of a car accident, it restrains a passenger to reduce the risk of injury.

Mercedes-Benz introduced the technology 35 years ago on the S-Class. Since then, it has saved millions of lives.

There are a few different types of pretensioners. However, the most common – pyrotechnic pretensioners – use explosively expanding gas to drive a piston that retracts a seat belt buckle during the first moment of an auto accident, thereby tightening the seat belt.

In real time, the process occurs in a matter of milliseconds. However, Gavin Free and Daniel Gruchy, The Slo Mo Guys, used special cameras to capture a pyrotechnic pretensioner retracting a buckle in extreme slow motion.

Check out the video:

What do you think? Does understanding how pretensioners work increase your confidence in seat belts? Tell us in the comments section below.

[Photo by Pelican Parts]

Filed Under: Archive, Cabin Technology Tagged With: Auto Trim, Auto Upholstery, Car Interior, Mercedes-Benz, Seat Belt, Seat Belt Pretensioner

Primary Sidebar

anal porno bangbros rus porno yaşlı porno konulu porno olgun porno porno izle sarışın porno bakire sex 69 porno

THR Sponsors

NC Sewing Machines
Miami Corporation - Right Rail Ad 3
  • Leather Craft
  • Douglass Interior Products
  • Keyston Bros
  • Hyde Leather
  • Albright's Supply
  • OEM+ Banner Ad - The Hog Ring

THR Favorites

Auto Upholstery - The Hog Ring - Estimates 101

Estimating 101: What You Need to Know

Giving fair price estimates is one of the … [more] about Estimating 101: What You Need to Know

Nissan Answers ‘Do Not Resew’ Inquiries

Earlier this year, we reported on Nissan’s … [more] about Nissan Answers ‘Do Not Resew’ Inquiries

Why Bentley Trimmers Use a Fork to Wrap Steering Wheels

Why Bentley Trimmers Use Forks to Wrap Steering Wheels

Bentley Motors equips its auto trimmers with … [more] about Why Bentley Trimmers Use Forks to Wrap Steering Wheels

Auto Upholstery - The Hog Ring - Bentley Mulsanne Steering Wheel

Wrapping a Bentley Steering Wheel

Believe it or not, wrapping the Mulsanne’s … [more] about Wrapping a Bentley Steering Wheel

The Hog Ring - How to Sew a Double-Piped French Seam

How to Sew a Double-Piped French Seam

If you're as obsessed with decorative … [more] about How to Sew a Double-Piped French Seam

The Hog Ring - Vilner Works its Magic on a Tesla Model 3

Vilner Works its Magic on a Tesla Model 3

The Tesla Model 3 is a pretty sweet car. But … [more] about Vilner Works its Magic on a Tesla Model 3

Categories

Footer

Recent Articles

  • Running a Trim Shop is Hard. This Free SBA Tool Makes It Easier
  • Subaru Seat Bolsters Are Failing. Here’s How to Fix Them (and Make Money)
  • Support Trimmers Affected by Catastrophic Flooding in Texas
  • Mercedes Reimagines Comfort with Custom Fit, 3D Printed Seat Pads
  • Wishing You a Happy Independence Day!

Recent Comments

  • Edward Munday on Hidden Mouse Nest? How to Charge for the Extra Dirty Work
  • Jack on Keyston Bros. Acquires DLT Corporation
  • Brodie Smith on Aston Martin Just Introduced a New Convertible DB12
  • THE CAPTAIN on 6 Tips for Turning Callers into Customers
  • Dmei on Star Wars Seat Covers are ‘So Wizard’

Advertise With Us!

We're always looking for companies to collaborate with. Watch this short video about the benefits of sponsorship and then email us to say hi.

Copyright © 2025 · Magazine Pro On Genesis Framework · WordPress · Log in