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 Loc. 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 Loc. 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.