Search found 507 matches

by Overclocker
Jan 18 2019 10:15am
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 83
Views: 13350

Re: New build, BHT mid-drive "direct", custom frame

this is actually my first time to notch so i'm surprised that it worked as well as it did :lol: maybe you just have to compensate for the thickness of the pipe. the template generated is really for a theoretical zero-thickness pipe. https://i.imgur.com/IVHKf7j.jpg "footpegs". cheap VP Components ped...
by Overclocker
Jan 18 2019 9:58am
Forum: General Discussion
Topic: MIG Welding questions
Replies: 19
Views: 1237

Re: MIG Welding questions

Image

i'm now getting half-decent results w/ flux-core wire but i wanna try MIG. is it that much better?

specifically i'm getting tired of the cleanup needed w/ flux-core. and the smoke :flame:
by Overclocker
Jan 16 2019 9:54am
Forum: E-Bike Non-hub Motor Drives
Topic: Mid Drive Steel Frame Bike
Replies: 22
Views: 1816

Re: Mid Drive Steel Frame Bike

very nice fab skills! is that MIG welding?

btw i'm just a bit concerned about the strength of the swingarm since you cut holes in it (red arrow). this weakens the rectangular tube. maybe you could weld a circular "cap" over the hole to strengthen it

Image
by Overclocker
Jan 16 2019 9:36am
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 83
Views: 13350

Re: New build, BHT mid-drive "direct", custom frame

Great progress! I'm curious about which method you use to bend tubes. And the tube notching is perfect how you did it? there's a machine shop very close to my house about 1 block away. i just print an actual size template of the bends and he does them on the steel pipe using a manual pipe bender w/...
by Overclocker
Jan 13 2019 9:46am
Forum: E-Bike Non-hub Motor Drives
Topic: BBSHD Build with GX Eagle 1x12?
Replies: 18
Views: 381

Re: BBSHD Build with GX Eagle 1x12?

mid-drives EAT drivetrains. over thousands of kilometers riding different mid-drives i've ruined many cassettes, chains, derailleurs, derailleur hangers, etc. so now i use only the cheapest 8spd components
by Overclocker
Jan 11 2019 9:32am
Forum: Battery Technology
Topic: Balancing a 20s battery back
Replies: 16
Views: 333

Re: Balancing a 20s battery back

3p shouldn't take long to balance. and if you built it well and if the cells are all from the same batch you don't even have to balance for like a year
by Overclocker
Jan 11 2019 6:03am
Forum: Battery Technology
Topic: High current weld strips
Replies: 9
Views: 259

Re: High current weld strips

.15mm nickel tabs spot welded to the A123. then 10ga stranded copper wire soldered on top. i guess the little spot welds create a bottleneck. but right now i can't think of a better way, without soldering directly onto the A123 That looks like what I was thinking originally. Obviously you were able...
by Overclocker
Jan 10 2019 9:14am
Forum: E-Bike Build Threads / Photos & Video
Topic: Big 100 Volt 54 ah Battery build
Replies: 11
Views: 356

Re: Big 100 Volt 54 ah Battery build

check out my method. pre-fluxed btw:

Image



Image




i guess soldering is ok if done fast. but i don't do it anymore because spot welding is easier.
by Overclocker
Jan 09 2019 9:11am
Forum: Battery Technology
Topic: High current weld strips
Replies: 9
Views: 259

Re: High current weld strips

https://i.imgur.com/TyPSaZn.jpg 4s2p anr26650m1a. sufficient to jump my cars a honda fit and a ford ecosport, both 1.5L engines .15mm nickel tabs spot welded to the A123. then 10ga stranded copper wire soldered on top. i guess the little spot welds create a bottleneck. but right now i can't think o...
by Overclocker
Jan 07 2019 7:10am
Forum: E-Bike General Discussion
Topic: Marzocchi fork help
Replies: 10
Views: 176

Re: Marzocchi fork help

you don't really need to have the QR-type 20mm axle. the pinch bolts you have now were orginally small QR levers if i'm not mistaken. so you simply need a plain 20mm axle of the correct length (it'll still have a bolt at the end to press everything together). then the pinch bolts will clamp onto the...
by Overclocker
Jan 05 2019 11:41pm
Forum: Battery Technology
Topic: Will the battery pack okay if the cells are not glued together?
Replies: 2
Views: 160

Re: Will the battery pack okay if the cells are not glued together?

if not glued it's possible for cells to chafe through (due to vibration) the very thin PVC sleeves and short.

for added protection i like putting a layer of kapton tape between opposing parallel groups, then bonding w/ silicone sealant
by Overclocker
Jan 05 2019 1:22am
Forum: E-Bike General Discussion
Topic: 428 chain sprockets and freewheel for ebike setup
Replies: 3
Views: 395

Re: 428 chain sprockets and freewheel for ebike setup

what kind of power are you running? 428 is rather heavy...

e.g. the sur-ron uses 420
by Overclocker
Jan 05 2019 1:10am
Forum: Battery Technology
Topic: Paralell 13s5p 18650s with rc lipos?
Replies: 11
Views: 262

Re: Paralell 13s5p 18650s with rc lipos?

i've done experiments here: https://endless-sphere.com/forums/viewtopic.php?t=83141 the GA's need to be discharged to 2.5v to get the most out of them. can your lipos go this low? if not then this isn't a good plan then what'll happen is the lipos will contribute more in the beginning. but as the li...
by Overclocker
Jan 05 2019 12:53am
Forum: Battery Technology
Topic: Samsung 35E vs 30Q Cycle Life
Replies: 23
Views: 932

Re: Samsung 35E vs 30Q Cycle Life

30qm. "m" means malaysia
by Overclocker
Jan 04 2019 8:46pm
Forum: Battery Technology
Topic: A sure way to check for fake cells
Replies: 8
Views: 1109

Re: A sure way to check for fake cells

Image

should have a stamped code there. you need to peel off a bit to see it
by Overclocker
Jan 04 2019 8:44pm
Forum: Items for Sale - New
Topic: em3ev firesaling their old BBS01 and BBS02 stock - $275
Replies: 4
Views: 380

Re: em3ev firesaling their old BBS01 and BBS02 stock - $275

"pre 2016". hmmm... those had controller issues, right?
by Overclocker
Dec 30 2018 2:41am
Forum: Battery Technology
Topic: Replacing with Rechargeables
Replies: 9
Views: 228

Re: Replacing with Rechargeables

many cheap flashlights rely on the internal resistance of AAA to limit the current to the LED :lol:
by Overclocker
Dec 30 2018 2:37am
Forum: E-Bike Build Threads / Photos & Video
Topic: Philippines Pedicab (Trisikad) Conversion
Replies: 10
Views: 346

Re: Philippines Pedicab (Trisikad) Conversion

Image

in case you wanna go li-ion... those are OG panasonic NCR. probably from unused laptop packs coz they're averaging 2800mah. Php100 per cell from a source just south of manila.
by Overclocker
Dec 24 2018 8:10am
Forum: E-Bike General Discussion
Topic: Marzocchi fork service
Replies: 7
Views: 299

Re: Marzocchi fork service

i have an old marzocchi drop-off dual-crown. primitive damper by today's standards. but i love the open-bath design. very simple, the same oil lubricates everything. it isn't leaking yet but i've purchased these seals just in case: https://www.aliexpress.com/item/Fork-OIL-SEAL-fit-MARZOCCHI-32-mm-FO...
by Overclocker
Dec 23 2018 9:22am
Forum: Battery Technology
Topic: Samsung 35E vs 30Q Cycle Life
Replies: 23
Views: 932

Re: Samsung 35E vs 30Q Cycle Life

Image

Image

i use 13s4p Sanyo GA w/ my BBS02. it lost 5% capacity in 14months of use. that's more than good enough for me

take note you're not going to be drawing 30A all the time w/ a BBS mid-drive on typical trail scenarios
by Overclocker
Dec 23 2018 3:23am
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 83
Views: 13350

Re: New build, BHT mid-drive "direct", custom frame

Image

Image

http://cq.cx/tubejoin.pl

finally the holidays, i think i'll have some time to work on this
by Overclocker
Dec 03 2018 10:14am
Forum: Battery Technology
Topic: TrustFire 14500 900mAh - trust or not?
Replies: 10
Views: 504

Re: TrustFire 14500 900mAh - trust or not?

i've used trustfire 14500's for flashlights and they're ok. trustfire is a just wrapper. the base cell inside was probably made by by an OK chinese factory like DLG, BAK or whatever. or maybe not. but the ones i've used were ok