Belts and Pulleys

Belts and Pulleys

Belts and pulleys are a great, lightweight option for building a smooth-running mechanism. They are very similar to chain and sprockets, with the belt replacing chain and pulleys replacing sprockets. The biggest difference is that belts are a set size and can not be adjusted, so you lose some flexibility in spacing options. If you want to change the spacing of your pulleys or use a different size pulley to increase speed, you will likely need a different sized belt.

In the REV ION Build System, we created a 6mm Round Belt System as well as new standard of belt called RT25.

Unlike many common metric belt standards, RT25 Belts haves a 1/4in pitch just like #25 chain. With this pitch, both RT25 belts and #25 chain work natively within the ION build system. Since they are both on a 1/4in pitch, they can be swapped out 1:1 for rapid prototyping and iteration of designs. The pitch compatibility with MAX Pattern also makes it easier to swap in different belt lengths when you want to make changes. These belts are comparable in strength to the belts that teams are accustomed to using while working on the same pitch as the ION Build System.

The ION 6mm Round Belt System provides a simple and adaptable way to transfer power in compact robot mechanisms. Designed around a 2in outer diameter when the belt is installed, the system stays on pitch with the REV ION wheel lineup, making it easy to integrate into intakes, conveyors, feeders, and other custom assemblies. At its core is a solid polyurethane round belt that can be cut to length and heat welded to form custom closed loops. Trimming the belt about 8 percent shorter than the final path helps account for stretch after welding and ensures proper tension once installed.

	The Round Belt Pulley with a 1/2in hex bore is a compact solution for direct driven shafts and includes a 1in bolt circle for alternate mounting methods. A single sided bearing race boss makes it possible to stack multiple pulleys, and teams needing bearing contact on both sides can add the 1/2in Hex Shaft Spacer 1/8in (REV-21-2004-PK10).
	The MAXSpline version offers the same belt driven outer diameter in a lighter, narrower profile that integrates cleanly with the MAXSpline ecosystem. Using either pulley allows the system to work with the matching shaft option, while the design also supports easy integration of multiple belts.
	The Polyurethane Round Belt itself is flexible, durable, and well suited for light power transmission tasks such as intakes and conveyors. Its ability to be welded into custom lengths gives teams the freedom to build mechanisms around the geometry they need, while the compliant belt and glass filled nylon pulleys provide smooth and low maintenance operation

Heat Welding Instructions

Coming Soon!

Specifications

Item	Bore	Tooth	Weight	Material
REV-21-2200	8mm Keyed	12T	15g (0.03lb)	Aluminum 6061
REV-21-2201	1/2in Hex	12T	11g (0.024lb)	Aluminum 6061
REV-21-4485	15T Spline	12T	16g (0.035lb)	Aluminum 6061
REV-21-2205	1/2in Hex	16T	26g (0.06lb)	Aluminum 6061
REV-21-2206	1/2in Hex	16T	44g (0.10lb)	Aluminum 6061
REV-25-2224	MAXSpline Bore	24T	Single: 23g (0.05lb) Double: 36g (0.08lb)	Glass-Filled Nylon
REV-25-2236	MAXSpline Bore	32T	Single: 44g (0.010lb) Double: 71g (0.16lb)	Glass-Filled Nylon
REV-25-2248	MAXSpline Bore	40T	Single: 74g (0.16lb) Double: 119g (0.26lb)	Glass-Filled Nylon
REV-25-2260	MAXSpline Bore	48T	Single: 98g (0.22lb) Double: 158g (0.35lb)	Glass-Filled Nylon
REV-25-2272	MAXSpline Bore	56T	Single: 120g (0.27lb) Double: 192g (0.42lb)	Glass-Filled Nylon
REV-25-2284	MAXSpline Bore	64T	Single: 148g (0.33lb) Double: 240g (0.53lb)	Glass-Filled Nylon
REV-21-4018	1/2in Hex	-	15g (0.033lb)	Glass-Filled Nylon
REV-21-4019	MAXSpline Bore	-	8g (0.018lb)	Glass-Filled Nylon