Having bought two hobbicolor refill kits for two printers---with no spare cartridges bought-------I now look to my supply of OEM cartridges and some used bulkinkjetcarts.com to provide one or more replacement sets of cartridges.
Step one seems to be to create a new ink inlet hole. I note that there is already a 16 page thread on the subject of sealing the ink inlet hole--be it by tape, some sort of a plug, hot melt glue, or screw thread.
Being conversant with screw threads as something I understand in making in metal, I would like to try the same in the plastic of a BCI-3&6 cartridge. While a straight screw thread--unlike its tapered counterpart the pipe thread-- is not designed to seal air tight by thread alone-------but a tight fitting O-ring provides that seal part.
I do note that a self taping #6 pan head stainless sheet metal screw seems favored by many, I note my local hardware does not carry those----but they do carry #8.
I also see that some try tapping 6-32 and one poster even advocated 10-32. I have just two fears on that------While a 32 tpi is a decent depth of thread on metal, its awful small on plastic. The other question is is there enough meat on the walls of the original fill hole of a canon or non-oem cartridge to support a 10-32 thread or the possibly better 10-24?--------but if I can use a self taping #8 stainless steel pan head screw I probably will.
One advantage of cutting my own thread is that I own a drill press, a handy vice,
a supply of taps, and can thus insure that the thread I cut is very close to perpendicular with the top plane of the cartridge------and have not figured out a method to hold a self tapping pan head screw to insure that same degree of perpendicular.
The other advantage to a cut thread is that I can also use nylon screws and maybe have a better screw head selection.
Sorry for the leagthy post, just trying to avoid errors and not have to resort to mail order parts.-------why experiment when others already have?
Step one seems to be to create a new ink inlet hole. I note that there is already a 16 page thread on the subject of sealing the ink inlet hole--be it by tape, some sort of a plug, hot melt glue, or screw thread.
Being conversant with screw threads as something I understand in making in metal, I would like to try the same in the plastic of a BCI-3&6 cartridge. While a straight screw thread--unlike its tapered counterpart the pipe thread-- is not designed to seal air tight by thread alone-------but a tight fitting O-ring provides that seal part.
I do note that a self taping #6 pan head stainless sheet metal screw seems favored by many, I note my local hardware does not carry those----but they do carry #8.
I also see that some try tapping 6-32 and one poster even advocated 10-32. I have just two fears on that------While a 32 tpi is a decent depth of thread on metal, its awful small on plastic. The other question is is there enough meat on the walls of the original fill hole of a canon or non-oem cartridge to support a 10-32 thread or the possibly better 10-24?--------but if I can use a self taping #8 stainless steel pan head screw I probably will.
One advantage of cutting my own thread is that I own a drill press, a handy vice,
a supply of taps, and can thus insure that the thread I cut is very close to perpendicular with the top plane of the cartridge------and have not figured out a method to hold a self tapping pan head screw to insure that same degree of perpendicular.
The other advantage to a cut thread is that I can also use nylon screws and maybe have a better screw head selection.
Sorry for the leagthy post, just trying to avoid errors and not have to resort to mail order parts.-------why experiment when others already have?
