GT2 Timing Belt

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GT2 timing belt

Vitamin

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Timing belt.
Wikipedia Toothed belt

The GT2 timing belt is a possible replacement for T2.5 and T5 timing belts that some believe may cause backlash. The GT2 series of belts are designed specifically for linear motion. They use a rounded tooth profile that guarantees that the belt tooth fits smoothly and accurately in the pulley groove, so when you reverse the pulley direction, there is no room for the belt to move in the groove.

Vendors

Belts

Vendor (shipping location) Product Width Pitch Length Additional notes
3Distributed (UK) Kit 6 mm 2.00 mm 1000 mm  
3DMakerWorld (US) Belt 6 mm 2.00 mm 1164 mm  
B&B Manufacturing (US) Belt 3 mm 2.00 mm 54-1910 mm  
B&B Manufacturing (US) Belt 6 mm 2.00 mm 54-1910 mm  
B&B Manufacturing (US) Belt 9 mm 2.00 mm 54-1910 mm  
Beltingonline (UK) Universal Kit for RepRap/Other 3D Printers 6 mm 2.00 mm 1032 & 1164 mm  
Beltingonline (UK) Kit for RepRap Prusa 6 mm 2.00 mm 900 mm  
Beltingonline (UK) Kit for Rostock Delta Robot 6 mm 2.00 mm 1524 mm  
Beltingonline (UK) Kit for Rostock Mini 6 mm 2.00 mm 1032 mm  
Charlie's 3D Technologies (BE) Belt 6 mm 2.03 mm 1000 mm  
eBay: fabster3d (CN) Belt 6 mm   974-1164 mm  
EmotionTech (FR) Belt 6 mm 2.00 mm 850 mm  
Fabberworld (CH) Belt 6 mm 2.00 mm 1000+ mm  
Gadgets 3D (PL) Kit for RepRap Prusa 2 6 mm   976 mm x 3  
Gadgets 3D (PL) Kit for Rostock Mini 6 mm   900 mm x 3  
Misumi (US) 2GT Belt 4 mm 2.00 mm 662-9942 mm  
Misumi (US) 2GT Belt 6 mm 2.00 mm 662-9942 mm  
Misumi (US) 2GT Belt 9 mm 2.00 mm 662-9942 mm  
Robotdigg (CN) Belt 6 mm 2.00 mm 1000-50000 mm  
RoyalSupply (US) Belt 6 mm 2.00 mm 1164 mm  
TechPaladin Printing (US) Belt 6 mm 2.00 mm 1380 mm  
Ultibots (US) Belt 6 mm 2.00 mm 1164 mm  

Pulleys

Vendor (shipping location) Product Material Belt width Bore Tooth Flange Additional notes
3Distributed (UK) Pulley   7 mm 5.00 mm 20 double  
3Distributed (UK) Kit   7 mm 5.00 mm 20 double  
3DMakerWorld (US) Pulley Polycarbonate, fiberglass, brass 6 mm 5.00 mm 36 double  
B&B Manufacturing (US) Pulley Aluminium 3 mm 5.00 mm 12-20 double  
B&B Manufacturing (US) Pulley Aluminium 6 mm 5.00 mm 12-20 double  
B&B Manufacturing (US) Pulley Aluminium 9 mm 5.00 mm 12-20 double  
Beltingonline (UK) Universal Kit for RepRap/Other 3D Printers Aluminium   5.00 mm 20 double  
Beltingonline (UK) Kit for RepRap Prusa Aluminium   5.00 mm 20 double  
Beltingonline (UK) Kit for Rostock Delta Robot Aluminium   5.00 mm 20 double  
Beltingonline (UK) Kit for Rostock Mini Aluminium   5.00 mm 20 double  
Charlie's 3D Technologies (BE) Pulley Aluminium, nylon 7 mm 5.00 mm 20 double  
Charlie's 3D Technologies (BE) Pulley Aluminium 7 mm 5.00 mm 20 double  
eBay: fabster3d (CN) Pulley Aluminium (black) 7 mm 5.00 mm 20 double  
EmotionTech (FR) Pulley Aluminium 6 mm 5.00 mm 20 double  
Fabberworld (CH) Pulley Aluminium 6 mm 5.00 mm 20 double  
Gadgets 3D (PL) Kit for RepRap Prusa 2 Aluminium (black) 6 mm 5.00 mm 20 double  
Gadgets 3D (PL) Kit for Rostock Mini Aluminium (black) 6 mm 5.00 mm 20 double  
Misumi (US) 2GT Pulley Aluminium 4 mm 5.00 mm 32 double  
Misumi (US) 2GT Pulley Aluminium 6 mm 5.00 mm 32 double  
Misumi (US) 2GT Pulley Aluminium 9 mm 5.00 mm 32 double  
Robotdigg (CN) Pulley Aluminium 6 mm 5.00 mm 20 double  
RoyalSupply (US) Pulley Aluminium 4-6 mm 4.76 mm 18 double You'll need to redrill them to fit on the usual 5mm motor shaft
Stock Drive Products (US) Pulley     5.00 mm 36    
Stock Drive Products (US) Pulley     5.00 mm 40    
Stock Drive Products (US) Pulley     5.00 mm 42    
TechPaladin Printing (US) Pulley Aluminium 6 mm 5.00 mm 20 double  
Ultibots (US) Pulley Aluminium 6 mm 5.00 mm 20 double  
UltiMachine (US) Pulley Aluminium 6 mm 5.00 mm 20 double  

Stock Drive Products

In the US, the best source is SDP/SI. They sell a huge variety of belts and pulleys that meet our needs. Always call SDP/SI for stock, their website is always out of date.

Note, unfortunately, SDP/SI does not carry a smaller diameter GT2 pulley with a 5mm bore, so to buy your pulleys here you need a larger pulley than in strictly ideal. These are fine, though. I use the 36 tooth pulleys on my printer and they work great.

Misumi

Another good source for GT2 pulleys and belts is Misumi. They carry a huge variety of suitable pulleys, including several that are closer to out ideal diameter. In addition, Misumi has offices around the globe so they are a better choice for international customers (though some regions will only sell to businesses).

Their website does not make it easy to browse for belts and pulleys, but here are the relevent pages in their catalog:

Note: Misumi calls theirs 2GT (2mm pitch) and 3GT (3mm pitch). As far as I know they are compatible with GT2, but both offer the same benefits. Misumi's pulleys seem expensive, but they are metal pulleys. We don't really need metal pulleys for our needs, but they are fine.