Damper Action

A fully modern damper action manufactured with advanced high performance materials.

damper action

Flange Rails

damper action flange rails

WNG Damper Flange Rails are unusually strong. Made of heavy gauge aluminum, all WNG Damper Flange Rails are brushed and anodized black for appearance.

Our strongest rail (left): For pianos with sufficient room in the damper cavity, this rail is the best choice if you wish to use damper assist springs. Because of it's strength, attachment to the belly rail is required only at the ends.

Our thinnest rail (right): For pianos with limited room for the damper action. Requires 3 mounting points instead of 2. This rail can be used with spring flanges if there is sufficient room behind the rail.


Sustain Pickup Tray

damper action sustain pickup tray

WNG Sustain Pickup Trays are extruded from heavy gauge aluminum.

Material and shape combine to produce a sustain pickup tray that is quite strong in relation to wood and resistant to changes in humidity. We are confident that, over time, this tray will resist the tendency to sag typical of wood.

For appearance, the tray has been brushed and decoratively anodized black.


Under Lever Mounting Flanges

WNG supplies two different flanges to mount the Under Levers on the damper flange rails. Both mount the under levers in exactly the same way.

damper action under lever mounting flanges

The Spring Mounting Flange allows the use of an adjustable damper assist spring but requires more space in the damper cavity.

The Standard Mounting Flange is used when there is less space in the damper cavity or there is no need for damper assist springs.


Spoon Length

WNG provides a bendable spoon for pickup to the key. Because situations vary there are three spoon lengths from which to choose.

When inserted into the under lever, three key pickup locations are available.

damper action spoon length

The Under Lever Top Flange

WNG provides two different top flanges:

The American Steinway type top flange features the sostenuto tab located correctly for sostenuto systems where the rod is mounted on the action frame.

The WNG Classic top flange features the sostenuto tab located 7mm lower than the Steinway type. The lower tab is advantageous because there will be more clearance between the sostenuto rod and the backcheck.

damper action top flange

Tall Under Lever Top Flange (left): With the sostenuto tab at the right height for actions with the sostenuto rod mounted on the action. Recommended for American Steinway.

Short Under Lever Top Flange (right): With the sostenuto tab at the right height for backcheck clearance. Recommended for everything other than American Steinway.


Hard Bushings

Cloth bushings have problems:

  • - Cloth bushings are unstable in a changing humidity environment
  • - As cloth bushings change, center pin torque changes
  • - As pin torque changes so does the touch of the piano

damper action hard bushings

In comparison, hard bushings are quite advantageous:

  • - Hard bushings are dimensionally stable as humidity changes
  • - When exposed to changing humidity, pin torque change is negligible
  • - The change in the touch of a piano is negligible

Test Results: After 18 million blows, pin torque exhibited virtually no change. In extreme environments, from 10% to 90% Relative Humidity, pin torque was stable.

Read how Wessell, Nickel & Gross succeeds where Teflon bushings failed...


Under Lever Features

WNG damper under levers have a number of useful features.

damper action under lever features
Custom Damper Action (Assembled)
Two Ways To Order *Please note that custom parts are non-refundable.* To order a Custom Damper Action you can either use the online ordering form below or use the PDF Damper Action Order Form. Once downloaded, you can either: A) Print the form, fill out the required information by hand, and then either mail or fax it to Wessell, Nickel & Gross at: Wessell, Nickel & Gross 4111 N. Freeway Blvd. Sacramento, CA 95834 Fax: (916) 567-1941 B) Open the PDF in the latest version of Adobe Reader, type your information directly onto it, save your finished form, and email it back to us at sales@wessellnickelandgross.com. Adobe Reader is free and can be found at this address: http://get.adobe.com/reader/.
What Options Should I Choose? If you have any questions regarding what options to order with or how to order your damper action, please download the Custom Back Action Process instructions. You can specify a custom damper action by following these steps: 1) If you want WNG to supply damper heads and wires you will need to: - Establish the number of dampers in the piano. - Establish the number of bass dampers. 2) Determine which flange rail to use. 3) Determine which under lever combination of - Mounting flange (If using the Spring Flange how many notes with assist springs.) - Top flange height - Spoon Length - Leading pattern 4) Determine whether or not you wish WNG to supply a sostenuto rod installation kit. Please note that this costs an additional $75.00.
Can you drill and tap aluminium rails? Drilling and tapping aluminium isn't difficult, but it is different than wood. You'll need aluminium tapping fluid, a 3.3 drill bit, and a M4.7 thread tap before you can start drilling. Please note that WNG does not include these materials with its damper actions. However, you don't have access to or can't find them, WNG offers them in a kit or you can buy them individually via the links below.
Do You Need A Scale Stick? To complete your order of an Assembled Custom Damper Action, you will need to send WNG a completed Scale Stick. For information on how to order a Scale Stick Kit and instructions on how to use it, please visit our Scale Stick page.
Installation Help

The damper action installation is broken into several parts. You can read each of the segments below:


Part Number: 06-5801

Custom Damper Action (Unassembled)
Two Ways To Order *Please note that custom parts are non-refundable.* To order a Custom Damper Action you can either use the online ordering form below or use the PDF Damper Action Order Form. Once downloaded, you can either: A) Print the form, fill out the required information by hand, and then either mail or fax it to Wessell, Nickel & Gross at: Wessell, Nickel & Gross 4111 N. Freeway Blvd. Sacramento, CA 95834 Fax: (916) 567-1941 B) Open the PDF in the latest version of Adobe Reader, type your information directly onto it, save your finished form, and email it back to us at sales@wessellnickelandgross.com. Adobe Reader is free and can be found at this address: http://get.adobe.com/reader/.
What Options Should I Choose? If you have any questions regarding what options to order with or how to order your damper action, please download the Custom Back Action Process instructions. You can specify a custom damper action by following these steps: 1) If you want WNG to supply damper heads and wires you will need to: - Establish the number of dampers in the piano. - Establish the number of bass dampers. 2) Determine which flange rail to use. 3) Determine which under lever combination of - Mounting flange (If using the Spring Flange how many notes with assist springs.) - Top flange height - Spoon Length - Leading pattern 4) Determine whether or not you wish WNG to supply a sostenuto rod installation kit. Please note that this costs an additional $75.00.
Can you drill and tap aluminium rails? Drilling and tapping aluminium isn't difficult, but it is different than wood. You'll need aluminium tapping fluid, a 3.3 drill bit, and a M4.7 thread tap before you can start drilling. Please note that WNG does not include these materials with its damper actions. However, you don't have access to or can't find them, WNG offers them in a kit or you can buy them individually via the links below.
Do You Need A Scale Stick? To complete your order of an Assembled Custom Damper Action, you will need to send WNG a completed Scale Stick. For information on how to order a Scale Stick Kit and instructions on how to use it, please visit our Scale Stick page.
Installation Help

The damper action installation is broken into several parts. You can read each of the segments below:


Part Number: 06-5802

Damper Action Installation Tool Kit
Understanding that most piano rebuilders have little-to-no experience installing damper actions, Wessell, Nickel & Gross has developed a comprehensive set of tools and procedures to help them install a WNG Damper Action into any piano. The Damper Installation Kit includes a Damper Action Measuring Tool, a Damper Flange Rail Punch, an Under Lever Center Height Gauge, and a Damper Pickup Half Stroke Gauge. The kit is meant to be used with WNG’s Damper Action Installation Procedure, which is divided into seven parts and can be found below.

Damper Action Measuring Tool

This invaluable tool quickly and easily performs the following operations:
  • 1. Tells you if a WNG damper action will fit inside your piano.
  • 2. Helps you pick the correct spoon length for your piano.
  • 3. Gives you the correct mounting block thickness for mounting to the belly rail.
  • Damper Flange Rail Punch

    The WNG Damper Flange Rail Punch is perfect for marking a flange rail for drilling.

    Under Lever Center Height Gauge

    This tool allows the technician to effortlessly arrive at the proper underlever center height for the damper action.

    Damper Pickup Half Stroke Gauge

    The Half Stroke Gauge makes it easy to create a half stroke relationship between the height of the underlever center pin and the spoon pickup to the key.


Part Number: 06-5675

Damper Action Rail - Thick
Damper Action Rail - Thick

Part Number: 06-0306

Damper Action Rail - Thin
Damper Action Rail - Thin

Part Number: 06-0352