N28D Ground Valve Sleeve .886-1.400"
N28D Ground Valve Sleeve .886-1.400" - 0.888 is backordered and will ship as soon as it is back in stock.
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Warranty & Returns
Warranty & Returns
Standard tools manufactured by Ferree’s Tools include a one-year limited warranty against defects. Eligible standard products may be returned within 30 days of the invoice date with an approved RMA number. Returns after 30 days may incur a restocking fee, and returns are not accepted after 180 days. Custom-manufactured products cannot be returned.
Delivery and Shipping
Delivery and Shipping
Most in-stock products are prepared within 24 hours and shipped within 48 hours. Free standard shipping is available worldwide, with processing fees of $10 for domestic orders, $20 for Canada and Mexico, and $30 for other international destinations. Chemicals must ship by ground and cannot be shipped overseas. Expedited shipping is available for an additional charge.
N28D Ground Valve Sleeve .886-1.400"
Built for Musicians
Purpose-built tools and supplies designed for accurate, efficient instrument repair.
Description
Description
These steel sleeves have a standard length of 3" and are used to straighten bent and out of round pistons. The sleeves have been bored and then honed to the exact sizes used when the valve casings were manufactured. This is a forming die. They are not adjustable.
IF YOU NEED THE SLEEVE SHORTER OR LONGER WE CAN MAKE THAT FOR YOU - CONTACT THE OFFICE!!!
For Sizes Not Listed or Special Sizes Please Enter Desired Size in the Note Section on the Check-out Page.
The recommended procedure for use:
Remove the valve cap, finger button, stem and guide from the piston.
Select the proper diameter sleeve and push the piston all the way in so the main body of the piston is completely covered by the sleeve.
Hold this complete assembly in the palm of your hand.
Use a F5 rawhide or F11 canvas mallet and strike the outside of the steel sleeve many times, rotating the sleeve in your hand as you go, so hammer blows strike the sleeve all the way around.
Continue this procedure until the piston works freely in the sleeve.
SLEEVES ARE NOT ADJUSTABLE ORDER THE EXACT SIZE.
TO ORDER THE CORRECT SIZE
Order by the O.D. of the piston. Example: Yamaha .664 Due to the differences in manufacturing over the years it is highly RECOMMENDED to measure the valve piston.
These mandrels are divided into 3 size groups:
(N28A Part # for sizes: .630-.700, N28C:.701-.885, N28D: .888-1.400
N28A For cornet and trumpet
N28C For alto horn, valve trombone, baritone and euphonium
N28D For sousaphone, Tuba, Bari
For Sizes Not Listed or Special Sizes Please Enter Desired Size in the Note Section on the Check-out Page.
Payment & Security
Payment methods
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Repair Knowledge at Your Fingertips
Explore helpful instructions, sizing charts, repair guides and videos created to help you choose the right products and work more confidently at the repair bench.
Frequently Asked Questions
How do I choose the correct size or model?
How do I choose the correct size or model?
Review the product specifications and measure your instrument or existing part when applicable. Because instrument models can vary, contact our team with the manufacturer, model and measurements if you need help confirming your selection.
Are Ferree’s Tools products for beginners?
Are Ferree’s Tools products for beginners?
Ferree’s Tools serves professional repair technicians, music educators and knowledgeable do-it-yourselfers. Required experience varies by product, so review all available instructions and contact us if you are unsure whether a tool is appropriate for your skill level.
What if I cannot find the exact product I need?
What if I cannot find the exact product I need?
Contact our customer service team with details about the instrument and repair. We can help you locate the appropriate product, identify a comparable option or determine whether another solution is available.
