GT3-3mm pitch Timing Belt

I have used lock tight myself and hope it holds up

 

Any one purchase this one yet, is it any better? I am too interested as it's light and inexpensive to replace.

"5000mm x 5mm of 3M timing belt 3mm pitch

This belt is made from polyurethane, steel reinforced, extruded endless.
Long service life, bearing wear and tear, resistant to oil, heat
Good anti-cracking performance, and small extending rate
Good surface without crack "

HTD 3M Timing Belt 5m (W=5mm) for CNC Robotics etc..

Found on ebay

http://www.ebay.com.my/itm/HTD-3M-T...135?pt=LH_DefaultDomain_0&hash=item2598b57297

http://www.ebay.com/sch/i.html?_fro...Belt+5m+(W=5mm)+for+CNC+Robotics+etc&_sacat=0

 

Nice pics some great ideas,
We will probably go with GT3 belts sooner rather than later,
know what you mean with the grub screws, not up to the job, infact
I have found this with the whole CNC kit. a bit more thought on quality and it would be so much better

 

http://www.pfeiferindustries.com/timing-belt-stress-analysis-i-21-l-en.html
Ok, found this external link that these analysis might answer my own question:

HTD Timing Belt in a HTD Timing Belt Pulley OK
HTD Timing Belt in a PowerGrip GT2 Timing Belt Pulley OK -no red

 

Kress spindle holder far to thin resulting in movment of the Kress spindle during operation,I had to get a after market one and fit it to the Z plate,
flexing in the X beam a problem I notice many people have this on 1500mm machines
I would of liked more bed supports on a 1500mm machine 2 is not enough, we had to make our own


Supplier issues: (remember this was a complete kit)
Nowhere near enough Stepper cable supplied
No relay supplied to operate the Spindle from the control box-mach3
No cable chain supplied

 

From my experience the steel reinforced belts (typically Gates SynchroPower) need to be operated well within the manufacturers recommendations. Any deviation (in my case increasing the axis acceleration beyond 0.6G's) can cause catastrophic failure where the bonding between the individual teeth and the reinforcing wire starts to break down. Although the overall belt may not stretch and the teeth appear in perfect condition they start to exhibit axial elasticity.

I now avoid this type of wire reinforced belt construction in favor of the Kevlar (or similar) reinforced types.

Tweakie.

 

Failed to order enough T3/20T pulleys! Anyone have an STL file for such a critter? I can print in carbon fibre a substitute till after the holidays. All that is lacking to have my 1000 x 650mm operational. My first CNC Mill, but have built four 3D printers. Thanks. Steve

 

This should do it: http://www.thingiverse.com/thing:16627

 

Does anyone know where I can find a Steps Per Inch Calculator that I can use with these belts? Everything I've found is for the GT2 or smaller belts and they are all based on the millimeter.

 

Thank you for your assistance.