# Looking for a solid "must print" set of replacement parts recommendation

**URL:** <https://forum.lulzbot.com/t/looking-for-a-solid-must-print-set-of-replacement-parts-recommendation/3570>\
**Category:** LulzBot Mini\
**Created:** [June 8, 2016, 11:11pm UTC](https://forum.lulzbot.com/t/looking-for-a-solid-must-print-set-of-replacement-parts-recommendation/3570 "2016-06-08T23:11:14Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![bmemike](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/bmemike/32/9448_2.png) [@bmemike](https://forum.lulzbot.com/u/bmemike)\
**Post date:** [June 8, 2016, 11:11pm UTC](https://forum.lulzbot.com/t/looking-for-a-solid-must-print-set-of-replacement-parts-recommendation/3570/1 "2016-06-08T23:11:14Z")

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I want to print some spare parts to have on-hand in case of failures.

I imagine the two herringbone gears are auto-includes on the list of must-print parts. Beyond those, what are typical failure modes for the mini that I should worry about or that people have run into?

Thanks!

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**Author:** ![wermy](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/wermy/32/9449_2.png) [@wermy](https://forum.lulzbot.com/u/wermy)\
**Post date:** [June 9, 2016, 9:04pm UTC](https://forum.lulzbot.com/t/looking-for-a-solid-must-print-set-of-replacement-parts-recommendation/3570/2 "2016-06-09T21:04:51Z")

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Just bought a Mini last week, this is something I was wondering about too. Hoping someone more knowledgeable can jump in here. 🙂

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**Author:** ![piercet](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/piercet/32/12_2.png) [@piercet](https://forum.lulzbot.com/u/piercet)\
**Post date:** [June 9, 2016, 11:24pm UTC](https://forum.lulzbot.com/t/looking-for-a-solid-must-print-set-of-replacement-parts-recommendation/3570/3 "2016-06-09T23:24:29Z")

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Idler Arm, Small extruder gear, eventually the Large extruder gear. A spare extruder body isn’t a bad idea either, but those are the most common failure points in order of likelihood of failure.

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**Author:** ![bmemike](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/bmemike/32/9448_2.png) [@bmemike](https://forum.lulzbot.com/u/bmemike)\
**Post date:** [June 10, 2016, 2:22am UTC](https://forum.lulzbot.com/t/looking-for-a-solid-must-print-set-of-replacement-parts-recommendation/3570/4 "2016-06-10T02:22:06Z")

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Thanks - I’ll add those to the queue!

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**Author:** ![wermy](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/wermy/32/9449_2.png) [@wermy](https://forum.lulzbot.com/u/wermy)\
**Post date:** [June 10, 2016, 1:54pm UTC](https://forum.lulzbot.com/t/looking-for-a-solid-must-print-set-of-replacement-parts-recommendation/3570/5 "2016-06-10T13:54:55Z")

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What would be best to print these in? It looks like they used the same HIPS that they included a sample of, but I’m not sure if it’s that or ABS.

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**Author:** ![piercet](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/piercet/32/12_2.png) [@piercet](https://forum.lulzbot.com/u/piercet)\
**Post date:** [June 10, 2016, 2:56pm UTC](https://forum.lulzbot.com/t/looking-for-a-solid-must-print-set-of-replacement-parts-recommendation/3570/6 "2016-06-10T14:56:15Z")

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Unless they have changed, most mini parts were printed in ABS at 85%-ish infil