TopMax DELRIN Lightened PRO Piston – TMPTNA/MIM

The lightened PRO piston by TopMax Elaborazioni is made with a compound based on DELRIN,
Elastomer and Fiberglass, melted and printed industrially in specific percentages provided by
TopMax Elaborazioni. The rack of our PRO piston is made of noble metal powders using M.I.M.
(Metal Injection Molding) technology, with a value of about 98/99% full of the total mass (performance
comparable only with CNC pieces that are 100% full of the total mass).  

The overall weight of the lightened PRO piston with M.I.M. rack stands at 14,20gr. The structure,
both as material and geometry, makes it one of the most resistant in the world to the stresses inside
the GearBox. The lightened PRO piston in DELRIN by TopMax Elaborazioni is compatible with all the
V2s and V3s GearBoxes and similar on the market (TECH TIPS: to avoid any type of problem with
GearBox length, we recommend to remove one tooth in release from the sector gear, as we designed
the rack for a perfect fitting with SHS sector gear ring nut). 

The M.I.M. rack is designed with the second missing tooth and the third tooth already lowered with a
30° bevel, ensuring a perfect working cycle and engagement with the sector gear. Metal Injection Molding
allows to obtain components, normally obtained from bars, forged and/or molded, with greater and wider
geometric flexibility while maintaining the characteristics of resistance and durabilità practically identical
to those made by CNC process. 

TECH TIP. The rack and the lenght of the TopMax PRO pistons have been designed for a perfect
complanarity with the sector gears teeth. This particular design can lead, on some GearBoxes, to the fact
that the piston touches the back of the GearBox shells before reaching the release moment.  For this
reason we STRONGLY RECOMMEND to check if the piston is free to disengage from the sector gear
before reaching the back of the GearBox shells. Beside this checking procedure, TopMax Elaborazioni
STRONGLY RECOMMENDS to cut at least 1 or 2 teeth in release (depending on the GearBox) on all
preparations/configurations with our PRO piston. 

The stress-test carried out on the lightened PRO piston with M.I.M rack have been performed with springs
and R.O.Fs. higher than those provided by the Italian law, so the product will ensure reliability, resistance,
durability and very high perfomance even with high speed/R.O.Fs configurations. To fix the rack on the piston
we recommend to have a look at the assembly tutorial at the link,
https://www.facebook.com/TOPMAXsoftair/videos/2268390613452114/ and use Loctite SuperAttak Gel or
similar to do it.