Description:
The needle gauge is small enough that GPL103 will not flow too easily and large enough that it has decent flow when the bottle is squeezed.
I experimented with several kinds of blunt needles. First, I started with what I can get easily and later ordered specialty needles. So far I tried 18, 21, 24, 27, 30, 32 gauge needles. Large blunt needles that you can get in the market was too wide that it was hard to control the flow of low viscosity GPL103. As for the speciality blunt needles, 32 was too narrow for GPL103, 30 was okay but I had to squeeze pretty hard to get decent flow, 27 was best so far for GPL103.
The bottle is made of LDPE(soft plastic) and can be squeezed to control oil flow.
I also ordered needle caps and luer lock caps to go with the set. The needle cap covers the needle so the needle is not damaged accidentally, but it doesn't seal the container. For sealing purposes, the luer lock cap could be used.
The kit is not hard to get. It is just that vendors don't sell them in low quantities. Bottles must be ordered in 10 units, needles and etc must be ordered in 50 units. And the shipping!! So, I bought 50 and now I am selling the left overs.
Note on the cap of 0.5oz bottle:
When the cap is closed with a decent force, the cap slips from the threads on the bottle. So, I had to twist the cap up to a point where I felt a little insecure about leaking. During normal use, I could detect no or very little leak on the threads, so the cap could be fine. However, to get a better seal I applied PTFE thread sealant tape on the threads of the bottle. 1oz bottle cap do not have the same problem.
Here are specification of the blunt needles I tried:
IT grade
Green 21 gauge ID 0.033mm OD 0.838mm
Red 24 gauge ID 0.022mm OD 0.559mm
NT grade
Clear 27 gauge ID 0.016mm OD 0.410mm
Lavender 30 gauge ID 0.012mm OD 0.310mm
Yellow 32 gauge ID 0.010mm OD 0.260mm
Some useful links:
http://jensenglobal.com/ - where I ordered the set $80
http://www.precisionoilerplus.com/ - sample precision oiler $4
http://www.ebay.com/itm/190819577584 - 24 gauge needle with 1 oz container
http://www.ebay.com/itm/330693781563 - Krytox oil GPL100 1/4oz in volume $15
http://www.ebay.com/itm/230738981154 - Krytox oil GPL100 1/2oz in volume $25
http://www.ebay.com/itm/251186711912 - Krytox grease GPL205 1/2oz (14g) in weight $24
http://geekhack.org/index.php?topic=42316.0 - Krytox oil GPL103 GB jdcarpe $10 per 1/2oz
http://geekhack.org/index.php?topic=41112.0 - Krytox oil GPL103 GB Jocelyn $8 per 1/2oz
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