Do new valves need grinding?
Do new valves need grinding?
Registered
If you are looking for more details, kindly visit Valve Grinding Machine Factory.
Join Date: Apr 2005
Location: Co. Carlow, Ireland
Posts: 455
Do new valves need grinding?
Considering whether brand-new valves require cutting or grinding might seem a bit perplexing, but it's a valid question worth exploring.
Initially, I intended to reuse my exhaust valves and had sent them to a machine shop for bead blasting and regrinding. However, due to the inefficiencies of the Royal Mail here in the UK, these valves were unfortunately lost in transit. This misfortune has left me contemplating whether new valves would necessitate grinding as well.
I'm uncertain if new valves come precisely ready for installation, or if they are manufactured slightly oversized, requiring grinding to achieve the correct specifications. Any guidance on this matter would be greatly appreciated, and I apologize if this query sounds somewhat naive!
For more Portable Valve Lapping information, please contact us. We will provide professional answers.
__________________
Charles
'84 911 3.2
The Home of Kwik-Way Valve Refacer Brands
Exclusive Six-ball Chuck Design
Every Kwik-Way valve refacer chuck features two sets of 3 balls each that grip the valve stem on that part which travels in the valve guide. This patented design ensures perfect concentricity between the stem and the valve head and provides precision and reliability.
The compound compensating, self-centering, six-ball chuck automatically aligns the valve, refacing it concentric with the original centerline of the valve system. This type of 2-point stem support is referred to as a “Centerless” grinding system.
The valve is kept firmly in place by pneumatic action, controlled either by a lock/release button or a convenient pedal. Pneumatic operated change-over also eliminates the need to switch off the motors when changing valves, reducing machining time and increasing life of motors.
The 6-ball chuck supports variable valve rotation speed, which allows the operator to adjust surface speed and ensure the best surface finish for a wide range of valve head diameters. The standard chuck supports valve stems between ø 4 and 14mm, and an optional chuck is available for larger diameters ranging from ø 11 to 21mm. Other valve grinding machines can require up to 9 separate collets to achieve the same range.
The chuck itself is mounted on the head, which can then be inclined up to 62°.
Want more information on Lapping Machine China? Feel free to contact us.