Kraton Pins inside diffs keep shearing off
- Thread starter Treyb8314
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EXB pins are a bit thicker than the normal ones or you can make your own using drill bits.
GraniteFox
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EXB Diffs hold up better. What power system are you running? How heavy is the center diff fluid?
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You probably already know this, but make sure you aren’t landing jumps on throttle.
MrTitanium
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Are you referring to the 31mm or 29mm (EXB) diffs?
The 31mm have 2.25mm Ø pins (AR310440). Arrma uses cheap Chinesium material that is undersized, which is an automatic death sentence to a diff and its internals. I ordered a few sets of M2C Racing pins.
https://m2cracing.net/shop/shop.php#!/M2C-3519-ARRMA-6S-SPIDER-GEAR-DIFFERENTIAL-PINS/p/579518825
The 29mm use 2.5mm Ø pins (p/n ARA713033). Although I've had no issues with the stock 29mm pins, I replaced them all with Mugen MUGH0274 units. Cheap insurance. Not going to chance a $0.50 pin grenade my diffs.
https://www.amainhobbies.com/mugen-seiki-2.5x11.8mm-roller-pin-10-mugh0274/p19593
The 31mm have 2.25mm Ø pins (AR310440). Arrma uses cheap Chinesium material that is undersized, which is an automatic death sentence to a diff and its internals. I ordered a few sets of M2C Racing pins.
https://m2cracing.net/shop/shop.php#!/M2C-3519-ARRMA-6S-SPIDER-GEAR-DIFFERENTIAL-PINS/p/579518825
The 29mm use 2.5mm Ø pins (p/n ARA713033). Although I've had no issues with the stock 29mm pins, I replaced them all with Mugen MUGH0274 units. Cheap insurance. Not going to chance a $0.50 pin grenade my diffs.
https://www.amainhobbies.com/mugen-seiki-2.5x11.8mm-roller-pin-10-mugh0274/p19593
RCbuzz
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Aliexpress also has hardened 2.25mm and 2.5mm blanks that many cut to size. I have not heard of much trouble with the exb pins but more issues with the BLX ones.
If you search the forum you will find several threads, pictures, some some analysis on this.
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I have the M2C pins in my new Notorious BLX diffs. Much better fit with no slop like the stock pins. Cheap and should last WAY longer.
This vid will show why the stockers break easily and why the drill blank pins fit better.
This vid will show why the stockers break easily and why the drill blank pins fit better.
RCbuzz
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Finally a worthy thumbnail!
I was constantly breaking stock pins in my non lsd diffs. I wasn’t landing on throttle but I love doing standing and rolling back flips.
I had success using drill blanks but found it to
Be a tedious task to cut the blanks to the exact size with a dremel abd then sanding down the edges.
M2c is just so convenient.
Once I replaced with the M2C pins and outdrives, never had that issue again.
I had success using drill blanks but found it to
Be a tedious task to cut the blanks to the exact size with a dremel abd then sanding down the edges.
M2c is just so convenient.
Once I replaced with the M2C pins and outdrives, never had that issue again.
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