Brake Bleed Nipple

[Pilbeam1]

I need to replace the brake bleed nipple in the Grimeca front caliper.
Where can I buy the original type that includes a ball?
Or can I use a conventional one with a taper seat?

[simonnorthroad]

Ive done the latter before now and dispensed with the ball-bearing.

Ive also spent days trying to bleed a Grimeca caliper before I discovered there was a ball-bearing blocking the passage....reverse bleeding with a syringe was messy

[EVguru]

Having a steel bleed nipple bear directly on the seat can tear them up badly over time. Having access to a lathe, I modify standard nipples.

[Pilbeam1]

Paul,
That's interesting.
Do you modify the bleed nipple to accommodate the ball bearing?
If that is true what diameter ball bearing do you use?

[Dickyboy]

Old thread resurrection but does anyone know a source for correct replacement bleed nipples / size of ball bearings? I've had to destroy a couple whilst working on getting the brakes sorted on my project. Thanks

[70sbikes]

The ball bearing rusted in my caliper and wouldn't seal properly. I didn't realise this, and in an attempt to stop the slight weep, I stripped the thread. I repaired the caliper using a Wilwood metric brake bleeder insert. This required drilling and a helicoil. I had to modify the bottoming tap so it would cut very close to the bottom of the hole. Having a decent press drill helped a lot. From memory, I also ground the bottom of the insert slightly for a better fit. All-in-all, it was worth the effort