C.S Osborne No621 ¾” ventilator setting tool

C. S. Osborne No.621 3/4" Ventilator Setting Tool

The C. S. Osborne No.621 is a professional 3/4" ventilator setting tool made for securely fitting cushion ventilators and their retaining rings into suitable upholstery materials.

Used by upholsterers, cushion makers and furniture workshops, this specialist cushion ventilator fitting tool supports the ventilator while controlled taps close the retaining assembly around the covering material.

It forms part of Status Fabrics' complete cushion ventilation system alongside the 3/4" Cushion Ventilator and C. S. Osborne No.245 13mm Ventilator Hole Punch.

Upholstery Ventilator Setter for Cushions and Mattresses

Cushion ventilators are used to allow air to move through suitable upholstered products as the internal filling is compressed and released.

The C. S. Osborne No.621 upholstery ventilator setter is designed specifically to help secure the 3/4" ventilator and retaining ring neatly around the covering material.

Typical applications include:

• Seat cushions
• Foam-filled cushions
• Mattresses
• Upholstered pads
• Suitable removable covers
• Plastic slip covers
• Furniture and upholstery ventilation systems

Using a dedicated ventilator setting tool helps produce a more controlled and consistent fixing than attempting to close the ventilator assembly with general-purpose tools.

How to Fit a 3/4" Cushion Ventilator

Begin by preparing the correct opening in the upholstery material.

For an accurately punched hole, use the C. S. Osborne No.245 13mm Ventilator Hole Punch.

Once the hole has been prepared:

1. Place the 3/4" ventilator neck facing upwards on the base of the setting tool.
2. Position the upholstery material over the ventilator neck.
3. Place the ventilator retaining ring over the neck with the bowed side facing upwards.
4. Position the setting tool correctly over the assembly.
5. Apply a few controlled, even taps with a suitable mallet.
6. Check that the ventilator is firmly and evenly secured.

The finished ventilator should sit securely without sharp raised edges, distortion or visible damage to the surrounding fabric.

3/4" Cushion Ventilator Installation Tool

Correct installation is particularly important when fitting a ventilator into upholstery fabric, leather or other suitable covering materials.

The No.621 cushion ventilator tool helps support the fitting during installation so that pressure is applied to the ventilator assembly rather than randomly across the surrounding material.

A properly installed ventilator should be:

• Securely retained
• Evenly seated
• Correctly aligned
• Free from sharp or raised edges
• Free from damage to the surrounding material

For the matching fitting itself, see the 3/4" Solid Brass Cushion Ventilator.

Complete Cushion Ventilator Fitting System

For professional installation, the three main components work together:

13mm Ventilator Hole Punch

The C. S. Osborne No.245 13mm Hole Punch prepares the clean round opening required in suitable leather or fabric.

3/4" Cushion Ventilator

The 3/4" Cushion Ventilator is a solid-brass fitting used as an air breather in suitable cushions, mattresses and covers.

No.621 Ventilator Setting Tool

The C. S. Osborne No.621 ventilator setter secures the ventilator and retaining ring after the opening has been prepared.

Using the correct punch and setting tool together provides a cleaner and more repeatable fitting process.

Use with an Upholstery Mallet

The No.621 is operated using controlled taps from a suitable mallet on a stable working surface.

The C. S. Osborne Wooden Beech Mallet is suitable for striking compatible upholstery tools and drive punches and makes a useful addition to a professional ventilator fitting setup.

Avoid excessive force. A series of controlled taps gives better control than attempting to set the fitting with one heavy blow.

Ventilator Setting Tool for Professional Upholstery

The C. S. Osborne No.621 is suited to professional upholsterers, cushion manufacturers, mattress makers, furniture manufacturers, repair workshops and experienced furniture restorers.

Its dedicated design makes it a useful upholstery ventilator fitting tool where repeatability and a clean finished installation are important.

For additional ventilators, punches and specialist workshop equipment, browse Press Studs & Rivets.

You can also browse Status Fabrics' wider range of Upholstery Tools & Accessories.

Professional C. S. Osborne No.621 3/4" ventilator setting tool for securely fitting cushion and mattress ventilators into suitable upholstery fabrics and coverings.

• Genuine C. S. Osborne No.621 setting tool
• made for 3/4" cushion ventilators
• Sets the ventilator and retaining ring securely
• Suitable for cushion, mattress and upholstery ventilator fitting
• Use it for professional upholstery and furniture workshops
• Used with controlled taps from a suitable mallet

For the complete fitting system, use with 3/4" Cushion Ventilators and the C. S. Osborne No.245 13mm Ventilator Hole Punch.