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
3DCracker CN GT2 Belt 6 mm 2.00 mm Open ended and closed-loop  
3Distributed UK Prusa Kit 6 mm 2.00 mm 1000 mm  
3Distributed UK Rostock/Delta 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 Separate Belt at 900mm length 6 mm 2.00 mm 900 mm Genuine Gates/Unitta GT2 belting.
Beltingonline UK Separate Belt at 976mm length 6 mm 2.00 mm 976 mm Genuine Gates/Unitta GT2 belting.
Beltingonline UK Separate Belt at 1032mm length 6 mm 2.00 mm 1032 mm Genuine Gates/Unitta GT2 belting.
Beltingonline UK Separate Belt at 1164mm length 6 mm 2.00 mm 1164 mm Genuine Gates/Unitta GT2 belting.
Beltingonline UK Separate Belt at 1386mm length 6 mm 2.00 mm 1386 mm Genuine Gates/Unitta GT2 belting.
Beltingonline UK Separate Belt at 1524mm length 6 mm 2.00 mm 1524 mm Genuine Gates/Unitta GT2 belting.
Beltingonline UK Universal Kit for RepRap/Other 3D Printers 6 mm 2.00 mm 1032 & 1164 mm Genuine Gates/Unitta GT2 belting & UK Manufactured Pulleys
Beltingonline UK Kit for RepRap Prusa 6 mm 2.00 mm 900 mm Genuine Gates/Unitta GT2 belting & UK Manufactured Pulleys
Beltingonline UK Kit for Rostock Delta Robot 6 mm 2.00 mm 1524 mm Genuine Gates/Unitta GT2 belting & UK Manufactured Pulleys
Beltingonline UK Kit for Rostock Mini 6 mm 2.00 mm 1032 mm Genuine Gates/Unitta GT2 belting & UK Manufactured Pulleys
Charlie's 3D Technologies BE Belt 6 mm 2.03 mm 1000 mm  
Cubic-Print DE GT2 Belt kit 6 mm 2.00 mm cut to length  
eBay: fabster3d CN Belt 6 mm   974-1164 mm  
eBay: yellowvirtualsales US Precision GT2 Belt 6 mm 2.00 mm Cut To Length  
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  
Makemendel IN GT2 Belt 7 mm 2.00 mm 660 mm  
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  
ReprapWorld.com EU [1] 6 mm 2.00 mm 1000-75000 mm  
RobotDigg CN 202mm Closed-loop GT2 Belt 6 mm 2.00 mm 202 mm  
RobotDigg CN 760mm Closed-loop GT2 Belt 6 mm 2.00 mm 760 mm  
RobotDigg CN GT2 Belt Open Ended 6 mm 2.00 mm 1000-50000 mm  
RobotDigg CN MXL 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  
Thingibox ES GT2 Belt 5 mm 2.00 mm any Worldwide shipping
Ultibots US Belt 6 mm 2.00 mm 1164 mm  

Pulleys

Vendor Loc. Product Material Belt width Bore Tooth Flange Additional notes
3DCracker CN GT2 Pulley   7 mm 5, 8mm 16, 20, 36 double  
eBay: Yellowvirtualsales US Timing Pulleys Aluminum, Metal 6mm - 10mm 5.00 mm 12-36 Vary  
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 Separate Timing Pulley (sold each) Aluminium 6 mm 5.00 mm 20 double UK Manufactured Precision Pulley
Beltingonline UK Universal Kit for RepRap/Other 3D Printers Aluminium   5.00 mm 20 double Genuine Gates/Unitta GT2 belting & UK Manufactured Pulleys
Beltingonline UK Kit for RepRap Prusa Aluminium   5.00 mm 20 double Genuine Gates/Unitta GT2 belting & UK Manufactured Pulleys
Beltingonline UK Kit for Rostock Delta Robot Aluminium   5.00 mm 20 double Genuine Gates/Unitta GT2 belting & UK Manufactured Pulleys
Beltingonline UK Kit for Rostock Mini Aluminium   5.00 mm 20 double Genuine Gates/Unitta GT2 belting & UK Manufactured Pulleys
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  
Cubic-Print DE Pulley / Kit 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  
Makemendel IN GT2 Pulley Aluminium 7 mm 5.00 mm 20 -  
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  
ReprapWorld.com EU Multiple types of Pulley Aluminium 5-6 mm 5mm Multiple double  
Robotdigg CN 16Teeth 2GT Pulley Aluminium 7 mm 5mm, 8mm 16 double  
Robotdigg CN GT2 Pulley Aluminium 7 mm 5mm, 8mm 20 double  
Robotdigg CN GT2 Pulley Aluminium 7 mm 5mm 36 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  
Thingibox ES GT2 Pulley Aluminium 4-6 mm 5.00 mm 16 double Length: 7mm; Worldwide shipping
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.

RobotDigg

China manufacturer base MXL pulley, GT2 pulley supplier. MXL belt and GT2 belt in different width, open ended or closed-loop. MXL pulley 18 teeth 5mm bore and mxl belt from stock for quick response. GT2 pulley 20 teeth 5mm bore and 8mm bore from stock. GT2 pulley 36 teeth 5mm bore from stock, can be redrill to 6.35mm or 8mm bore to fix.

  • MXL
    MXL pulley 18 teeth, 5mm bore
  • 2GT
    GT2 pulley 20 teeth, 5mm bore
  • 2GT
    GT2 pulley 20 teeth, 8mm bore
  • 2GT
    GT2 pulley 36 teeth, 8mm bore

More pulleys available. OEM service for small quantity a 100pcs base.

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.