DingusMcGee
10 kW
Does anyone know who sells the ISIS BB axle [spindle] of length near 177mm? Or longer?
Since SickBikeParts closed I cannot find this item.
Since SickBikeParts closed I cannot find this item.
Last edited:
Finding or Making an ISIS BB Spindle >>177mm overall
- Thread starter DingusMcGee
- Start date
DingusMcGee
10 kW
This company makes ISIS spindles in 3 lengths. $38 - $48 /each
www.cycmotor.com
They may need a little machining to fit the standard English 1.375 x 24 BB shell and standard ISIS bearings?
My spindle preference has shifted from square taper to IsIs because for edirtbiking the ST spindles occasionally break …maybe from the cranks & shaft hitting rocks ?
Gen 3 ISIS Spindle | cycmotor
Includes 1x ISIS spindle Compatible with Gen 3 kits and PhotonSpindle length options: 180mm suitable for 68/73/83mm bottom bracket options 200mm suitable for 100mm & BB92 bottom bracket options 220mm suitable for 120mm bottom bracket optionsAll pricing is listed in USD
www.cycmotor.com
They may need a little machining to fit the standard English 1.375 x 24 BB shell and standard ISIS bearings?
My spindle preference has shifted from square taper to IsIs because for edirtbiking the ST spindles occasionally break …maybe from the cranks & shaft hitting rocks ?
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DingusMcGee
10 kW
All said and purchased:
$48 Isis + shipping $30 = $78
Is there a China made version of this?
$48 Isis + shipping $30 = $78
Is there a China made version of this?
A-DamW
100 W
DingusMcGee
10 kW
Thanks A-DamW,
SickBikeParts has the eBay seller’s name of brook45izy. They do have 2 sizes of Isis spindles for sale measuring 148mm & 153 mm. The price is good but they are too short for my motor width.
Thanks for the suggestion.
SickBikeParts has the eBay seller’s name of brook45izy. They do have 2 sizes of Isis spindles for sale measuring 148mm & 153 mm. The price is good but they are too short for my motor width.
Thanks for the suggestion.
DingusMcGee
10 kW
Lightning Rods has an Isis spindle for lengths that fits 100mm BB which makes for a overall length of some 180mm.
See:
lightning-rods10.mybigcommerce.com
See:
Bottom Bracket Spindle
The best value in a high performance mid drive kit
pwd
10 kW
Did you end up using this bottom bracket spindle? Do you have any photos of how it was used etc...?
DingusMcGee
10 kW
HI pwd,
No, I did not use that GEN3 [nominal spindle] spindle as it’s size (other than it’s length) has some OD’s that are too large for the standard Isis bearings to slide over into the places my BB shell zone would occupy.
I thought about and have the tools to grind the heat treated Gen 3 shaft to standard Isis bearing ID size but it seems easier to employ the Lightening Rod standard Isis BB spindle and if the shaft is a little short of being long enough opposite the motor output side, I can cut an Isis crank fitting end off another Isis shaft and weld it to the to the short left side crank fitting of the Isis shaft. The Isis BB spindle has a round hole thru it so that feature will make for an easier alignment to the full axel for a tru-straight addition. Also the crank attaching zone is threaded.
Both my QS2000 and QS3000 edirtbikes were built using the 5/8” OD square drive spindles. The QS 2000 has broken one square drive spindle. It was a creep type propagation lateral load failure [bending]. These spindles are idler shafts for double sprocket BB hubs on these bikes and the shafts get no torque loadings. They do get standing on the pedal weightings and impulse loadings on the pedals from hitting projecting rocks along the trails. And of course chain tension difference lateral loadings.
The Isis spindle does look enough bigger than the 5/8” square drive shaft to approx calculate being some 221% as strong as the 5/8” spindle — for a bending failure.
If i end up modifying a Lightening Rod Isis spindle i will post-up
No, I did not use that GEN3 [nominal spindle] spindle as it’s size (other than it’s length) has some OD’s that are too large for the standard Isis bearings to slide over into the places my BB shell zone would occupy.
I thought about and have the tools to grind the heat treated Gen 3 shaft to standard Isis bearing ID size but it seems easier to employ the Lightening Rod standard Isis BB spindle and if the shaft is a little short of being long enough opposite the motor output side, I can cut an Isis crank fitting end off another Isis shaft and weld it to the to the short left side crank fitting of the Isis shaft. The Isis BB spindle has a round hole thru it so that feature will make for an easier alignment to the full axel for a tru-straight addition. Also the crank attaching zone is threaded.
Both my QS2000 and QS3000 edirtbikes were built using the 5/8” OD square drive spindles. The QS 2000 has broken one square drive spindle. It was a creep type propagation lateral load failure [bending]. These spindles are idler shafts for double sprocket BB hubs on these bikes and the shafts get no torque loadings. They do get standing on the pedal weightings and impulse loadings on the pedals from hitting projecting rocks along the trails. And of course chain tension difference lateral loadings.
The Isis spindle does look enough bigger than the 5/8” square drive shaft to approx calculate being some 221% as strong as the 5/8” spindle — for a bending failure.
If i end up modifying a Lightening Rod Isis spindle i will post-up
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pwd
10 kW
Excellent, thanks for the the reply DingusMcGee.
DingusMcGee
10 kW
pwd,
I did start to machine down some oversized (for bearing installation) zones of the GEN3 Isis BB spindle but stopped because I could not find any metric bolts with fine enough threads to screw into the ends of the GEN3 to hold on the pedal crank arms.
The LR spindle is ground to 21.3 mm for bearing ID and the cup fit OD is 31mm. The Gen 3 spindle is bigger.
But Eureaka, I have found such a bolt. The front wheel hub tire mounting studs on a Ford E350 Super Duty Van are the correct thread.
I did start to machine down some oversized (for bearing installation) zones of the GEN3 Isis BB spindle but stopped because I could not find any metric bolts with fine enough threads to screw into the ends of the GEN3 to hold on the pedal crank arms.
The LR spindle is ground to 21.3 mm for bearing ID and the cup fit OD is 31mm. The Gen 3 spindle is bigger.
But Eureaka, I have found such a bolt. The front wheel hub tire mounting studs on a Ford E350 Super Duty Van are the correct thread.
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DingusMcGee
10 kW
pwd,
The GEN3 spindle would have been short for the present QS3000 set up. So I did add an Isis shaft section to the Lightening Rod Isis BB spindle [nominal 100mm Isis BB] that was about 3” too short.
A 3” end section on a short Isis crank was cut off employing a skinny wheel grinder for cutting the lathe spun BB spindle.
Here is the cut off Isis end to be attached to the LR spindle. The shaft hardening did not penetrate to the surface of the longitudinal hole so drilling the hole larger is quite easy.
Next a bolt was threaded into the LR Isis spindle
The tightened end bolt (M12 x 1.0) was lathe turned down to tight-fit into the add-on Isis shaft end. But before hammering the shafts together, the splines were aligned so the pedal crank arm attachment would have exactly 180 degrees rotation separation of the arms.
The short Isis end was dead blow hammered down onto the LR Isis spindle. Here is the snug result:
A small width circular cut was ground around at the joint to permit more welding surface. This length addition was clamped before welding.
Here is the welded longer Isis spindle….
A eutectic high alloy electrode [4036] was used
A long square end spindle next to the fabricated equal length Isis spindle. [weld has been ground]
The lengthened Isis spindle placed on the bottom of the QS3000 motor frame for size comparison
The lengthened spindle still will need some zones turned down for the bearing to slide into what become the BB bearing zone. If the final bearing position is where the shaft is undersized I will fit the bearing with shim stock or weld the zone up and lathe turn it down to a snug bearing fit.
The GEN3 spindle would have been short for the present QS3000 set up. So I did add an Isis shaft section to the Lightening Rod Isis BB spindle [nominal 100mm Isis BB] that was about 3” too short.
A 3” end section on a short Isis crank was cut off employing a skinny wheel grinder for cutting the lathe spun BB spindle.
Here is the cut off Isis end to be attached to the LR spindle. The shaft hardening did not penetrate to the surface of the longitudinal hole so drilling the hole larger is quite easy.
Next a bolt was threaded into the LR Isis spindle
The tightened end bolt (M12 x 1.0) was lathe turned down to tight-fit into the add-on Isis shaft end. But before hammering the shafts together, the splines were aligned so the pedal crank arm attachment would have exactly 180 degrees rotation separation of the arms.
The short Isis end was dead blow hammered down onto the LR Isis spindle. Here is the snug result:
A small width circular cut was ground around at the joint to permit more welding surface. This length addition was clamped before welding.
Here is the welded longer Isis spindle….
A eutectic high alloy electrode [4036] was used
A long square end spindle next to the fabricated equal length Isis spindle. [weld has been ground]
The lengthened Isis spindle placed on the bottom of the QS3000 motor frame for size comparison
The lengthened spindle still will need some zones turned down for the bearing to slide into what become the BB bearing zone. If the final bearing position is where the shaft is undersized I will fit the bearing with shim stock or weld the zone up and lathe turn it down to a snug bearing fit.
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DingusMcGee
10 kW
To begin finishing the spindle about 12 welding beads were put on the shaft along its lengthwise direction in the undersized zone on and adjacent to the shaft splice. These welds were turned down on a lathe to a bearing side-fit diameter. A coat of Halburton Weld A [similar to JB weld] was applied to this zone.
The QS3000 motor mount position was close to being centered about the BB shell. So the to be centered spindle was turned to leave a bearing stop placement = 2 x bearing widths inside the right bearing cup location. The plastic steel ( kind of a shim stock) was mostly lathe turned off.
The installed shaft does make for a quieter drive. The old square drive mount double sprocket BB hub was reused by simply changing the existing bearings to Isis bearings — same OD.
The QS3000 motor mount position was close to being centered about the BB shell. So the to be centered spindle was turned to leave a bearing stop placement = 2 x bearing widths inside the right bearing cup location. The plastic steel ( kind of a shim stock) was mostly lathe turned off.
The installed shaft does make for a quieter drive. The old square drive mount double sprocket BB hub was reused by simply changing the existing bearings to Isis bearings — same OD.
DingusMcGee
10 kW
Since the first Isis spindle lengthening, shown above, I have partially built 5 more spindles. The last step of building is to fit/turn them for the specific bearing locations the build requires. I have made lengths of 208 mm and 228 mm.
There are several procedures I have devised that insure a straight shaft the first attempt.
1. The best rod to insert as a coupler for the 2 spindle pieces for a tight fit and superb strength is the 7/16” L9 Allen bolt x 4”. For starters tighten a crank-arm retaining bolt into the short spindle. Then drive the Allen bolt into the shaft hole from the cut-off side until it stops when it hits the retaining bolt. At this point cut-off the Allen head of the bolt. On one occasion the 7/16” bolt was not a very tight fit into the longer spindle side. To “shim” this under sized fit, simply use a drug spatter weld in 3 longitudinal passes about 120 degrees apart. Then drive the shaft home until the 2 weld faces meet.
The drag spatter weld
2. Make 2 very short longitudinal welds on diametrically opposite sides of the spindle. Begin moderate peening on the first weld immediately after finishing the second bead. Water quench the shaft to make for handling before making the next 2 welds.
3. Optional? Make a better compression clamping jig than the pipe clamp.
My clamping jig
4. Test the straightness by inserting the spindle with bearings and bearing cups into a bottom bracket shell and test for ease of rotation. If the spindle has very poor alignment, due to warping at the weld, I have cut out and off about a quarter inch on each side of the splice and then started the spindle joining process over.
Employing the very stiff the jig, I was able to produce a straight shaft using an acetylene gas torch to do the joining welding. I spent more time peening as it took some time for the spindle to cool to the temp that likely more peening produced little stress release. For the brazing rod I used some of each of the 2 known brands of nickel-silver brazing rods that have a 120,000 psi ultimate strength and with flux that flow well.
There are several procedures I have devised that insure a straight shaft the first attempt.
1. The best rod to insert as a coupler for the 2 spindle pieces for a tight fit and superb strength is the 7/16” L9 Allen bolt x 4”. For starters tighten a crank-arm retaining bolt into the short spindle. Then drive the Allen bolt into the shaft hole from the cut-off side until it stops when it hits the retaining bolt. At this point cut-off the Allen head of the bolt. On one occasion the 7/16” bolt was not a very tight fit into the longer spindle side. To “shim” this under sized fit, simply use a drug spatter weld in 3 longitudinal passes about 120 degrees apart. Then drive the shaft home until the 2 weld faces meet.
The drag spatter weld
2. Make 2 very short longitudinal welds on diametrically opposite sides of the spindle. Begin moderate peening on the first weld immediately after finishing the second bead. Water quench the shaft to make for handling before making the next 2 welds.
3. Optional? Make a better compression clamping jig than the pipe clamp.
My clamping jig
4. Test the straightness by inserting the spindle with bearings and bearing cups into a bottom bracket shell and test for ease of rotation. If the spindle has very poor alignment, due to warping at the weld, I have cut out and off about a quarter inch on each side of the splice and then started the spindle joining process over.
Employing the very stiff the jig, I was able to produce a straight shaft using an acetylene gas torch to do the joining welding. I spent more time peening as it took some time for the spindle to cool to the temp that likely more peening produced little stress release. For the brazing rod I used some of each of the 2 known brands of nickel-silver brazing rods that have a 120,000 psi ultimate strength and with flux that flow well.
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DingusMcGee
10 kW
@darreny ,
Thanks for pointing out this source for Isis spindles:
hello are you still interested in getting this?.
you can contact Dan he has a ISIS BB axle [spindle] of length near 177mm for sale........... PM him @ danwilson8320@gmail.com
Was this spam?
Thanks for pointing out this source for Isis spindles:
hello are you still interested in getting this?.
you can contact Dan he has a ISIS BB axle [spindle] of length near 177mm for sale........... PM him @ danwilson8320@gmail.com
Was this spam?
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