ant Report post Posted December 4, 2015 Hi, I recently purchase a 2nd hand Cobra Class 18 machine, looking to upgrade the bobbin case and rotary hook to a Hirose. Anyone know which model of the Hirose should i get? Hook 18033? Hirose HSM-A(5)? Bobbincase 18045? Thanks in advance for your kind advise. Quote Share this post Link to post Share on other sites
CowboyBob Report post Posted December 4, 2015 (edited) Yes,those should work. Edited December 4, 2015 by CowboyBob Quote Share this post Link to post Share on other sites
ant Report post Posted December 4, 2015 Yes,those should work. Thanks Bob Quote Share this post Link to post Share on other sites
Art Report post Posted December 4, 2015 Hi, I recently purchase a 2nd hand Cobra Class 18 machine, looking to upgrade the bobbin case and rotary hook to a Hirose. Anyone know which model of the Hirose should i get? Hook 18033? Hirose HSM-A(5)? Bobbincase 18045? Thanks in advance for your kind advise. Yep, same as the Seiko 8BL or the Consew 206RB Art Quote Share this post Link to post Share on other sites
Gregg From Keystone Sewing Report post Posted December 8, 2015 (edited) This thread contains a lot of incorrect information; Cobra 18 stock hook Koban Mfg. part number is KHS20-RM2, not KHS20-RPEM2AO like the Consew 206RB or Seiko STH-8BL type. Koban part number for bobbin case also is SC33-L, NOT same as Consew/Seiko SC33-LD. Cobra 18 stock hook from Hirose is mfg. part number HSM-A, NOT HSM-A(5) like the Consew 206RB or Seiko STH-8BL type. Hirose part numbr for the bobbin case BC-DLN, NOT same as Consew Seiko BC-STH. Hope this information helps correctly replace your hook and bobbin case when necessary. Edited December 8, 2015 by Gregg From Keystone Sewing Quote Share this post Link to post Share on other sites