1 Topic by GMBridge

  • GMBridge
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Topic: SD4 carriage upgrade - screw sizes & idlers?

so i'm going to be upgrading to lawsy's carriages soon, but it seems some of the screws for my SD4 are stripped, namely the left Y-idler, and the head of the left grub screw for the toothed gear for the left Y belt (on the jackshaft? driveshaft? not sure which is proper term).

so besides finding out the right sizes & sources for those (and from measuring the right y-idler shoulder bolt, they seem to be $6+ each!!), i assume i just need a lot of M3 bolts in various lengths? i've got a home depot & an ace hardware nearby, and mcmaster carr has a distro hub about 45 minutes away for pickup, and there's a couple small fastenal stores nearby.

going from belts to spectra line at the same time, anything else i should swap or consider upgrading while the X/Y is torn apart? maybe change out the Y-idlers since the tension adjust will be on the carriages?

TLDR: SD4 Y-idler bolt size, SD4 grub screw sizes, what specialty m3 lengths & specialty bolts/machine screws need?

2 Reply by wardjr

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  • wardjr
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Re: SD4 carriage upgrade - screw sizes & idlers?

Everything is m3 except the y idler those are m5 I'm pretty sure if not its m4.  Ace is the place so just grab both.  You can measure the length needed for the Y but the others just grab varying lengths you'll need them all

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3 Reply by GMBridge

  • GMBridge
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Re: SD4 carriage upgrade - screw sizes & idlers?

wardjr wrote:

Everything is m3 except the y idler those are m5 I'm pretty sure if not its m4.  Ace is the place so just grab both.  You can measure the length needed for the Y but the others just grab varying lengths you'll need them all

any idea on the length of the grub screws?

4 Reply by wardjr

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Re: SD4 carriage upgrade - screw sizes & idlers?

2 to 3 mm

Printit Industries Model 8.10 fully enclosed CoreXY, Chamber heat
3-SD3's & a Workbench all fully enclosed, RH-Slic3r Win7pro, E3D V6, Volcano & Cyclops Hot End
SSR/500W AC Heated Glass Bed, Linear bearings on SS rods. Direct Drive Y-axis, BulldogXL
Thanks to all for your contributions

wardjr's Website