ISC Zippey V3 Pulley (8-13mm rope)
Having consulted zipline operators from around the world throughout the development of the Zippey, we have succeeded in incorporating all the positive features needed to overcome the challenges faced by the industry.
Zippey is manufactured from high-spec 4mm aluminium plate, has a forged Aluminium gate and Stainless Steel wheels; all of which offer the best weight to performance ratio on the market. The Zippey trolley weighs 450g (1.0lb), [equaling the weight of the Petzl Trac+], yet has an MBS of 25kN (5620lbf) and therefore exceeds the 2260kg (5000lb) rating required by US standards, as well as being fully CE approved.
Product Upgrade- ZIPPEY
May 16th 2017
ISC products are constantly evolving and since the first launch of Zippey more than 3 years ago, we have gathered feedback from zip operators from all around the world and fed them into an engineering review. This review has specifically been driven by a number of concerns about the variation in performance/longevity of the Zippey trolleys returned by various customers/test sites around the world. We know that different sites around the world have very different environments (humidity, coastal locations, sandy environments...etc.) and these have significant effects on the bearings.
1. Cable: Cable Construction is a key factor. Coarse cable can be of significant detriment to the longevity of the trolley and especially the bearings. There is a reasonable correlation between the coarseness of the cable ('6 x 25' cables being the worst cable type), and the life of the bearing.
We like to use the analogy of having a Ferrari and driving it on a cobbled street! You just wouldn’t! A Ferrari should be driven on smooth highways...and Zippeys (and all Zip Trolleys) like to run on smooth cables!
2. Bearings: Our investigation into the quality and type of bearings that we use found that they needed to be sourced directly from a reliable, specialist manufacturer to ensure consistent quality. After all, the bearings are the critical component in the trolley!
We consulted with a bearing specialist from Schaeffler (a German bearing manufacturer) and their recommendations enabled us to select the most suitable bearing for the Zippey. The bearing also has a specific seal type (recommended by the Applications Engineer), to reduce the effect of corrosion. The use of this specific seal means that the Bearing doesn't need to be maintained or re-greased.
The bearing has an RPM (also known as 'Limiting Speed') of 20,000rpm, which will allow an optimum max theoretical speed of 70mph/113kph (based on a wheel diameter of 30mm (1 3/16").
3. Wheels: The advice from the bearing specialist also confirmed that the bearing housing (the wheel), should be of a sufficient hardness to support the bearing. We have therefore increased the hardness of our wheels, so that they are hard enough to resist any deformation during use and to provide adequate support for the bearing. We have switched to a special type of Stainless Steel which provides an outstanding combination of high strength and optimal mechanical properties, suited to the typical range of operating temperatures. This material also provides excellent corrosion resistance. Although in very harsh environments, it may gradually develop overall light rusting and pitting, this superior material is vastly superior to the standard Heat-treatable Stainless Steels.
As part of the design review, consultation with wire cable specialists and LEEA, lead to a consensus of opinion that the harder wheel material would not result in a detrimental effect on the wire cable- in fact, the hardness of the new wheels is still comparable with competitor trolleys.
The new wheel material is designed to be factory-hardened, as the material must be hardened after the machining process. This hardening process results in an iridescent (purple/bronze) coloured finish to the surface of the wheel. This is a normal effect of this superior material and treatment.
The integral design of the Zippey remains unchanged and we're still using a double row of bearings for stability during flight, (single bearings can cause the trolley to try to climb the cable which results in uneven wear to one side or the other).
Other upgrades to the Zippey Range include:
|Number of persons||1|
|(MBS) Minimum Breaking Strength (kN)||25|
|(MBS) Minimum Breaking Strength (lbf)||5620|
|Wheel material||Stainless steel|
|Thickness (inches)||1 1/2|