Originally Posted by
ThayerRags
Tammi, I’ve heard that there’s a difference between the complete bobbin/hook assemblies between the models 221 and 301, even though they take the same bobbin and bobbin case. I’ve never compared them to see how they differ.
Any chance that it’s got a mix of parts causing the bad fit?
CD in Oklahoma
Thanks for bringing that up. I did know about some differences, but I went downstairs to survey the machines that I have here. For the record they are:
1. LBOW SB 301A
2. 1950 221
3. 1948 221 (my "painter" - it's disassembled waiting on a paint job)
4. 1957 222k
5. My customer's 222K
Here's what I expected to find:
All FWs share the hook and bobbin case numbers, with possible superceded numbers.
301 would have different part numbers for hook (I mean, it's a slant right? chances are the angle of the needle alone could cause differences) and bobbin base plate.
Here's what I found.
Bobbin Base part numbers:
221:45752
222:45926
301:170166
Hook part numbers:
221: 45827
222:170135
301:170135
Yes. I checked those last 2 numbers 3 times.
The parts charts at brewer sewing show that the 170135 is the hook number for the FW machines and their parts chart for the 301 doesn't show the hook number separately, but the one on the Singer site does.
http://www.brewersewing.com/StockIma...21K4,221K5.pdf
http://www.brewersewing.com/StockIma...uals/221K7.pdf
http://parts.singerco.com/IPpartCharts/301-1_2_3.PDF
I can only guess at this point that the 170135 supercedes the 45827 and has a wide enough opening that even a slant needle won't cause a collision.
So that just leaves the base plates. They don't -look- different to me, so it's at the micrometer level that they're different. I even compared fingers and for some reason, though I'm sure I've seen a difference at some point, I couldn't see it today.
The 222K currently has the older hook - the 45827 - it's what Glenn sent me - and a 45752 bobbin base plate. It's a tight fit to get it in and out - that could be a function of my sore hands too though because most of them gave me grief during this experiment - but it spins naturally when it's in place.
My painter now has the older hook and the 222K bobbin base plate and spins 99% properly. It's a little weird if turned backward, but is otherwise good. It's also not installed in a machine at the moment, so it may be weird just because.