The original factory right side focus knob for the LPL 7700/670XL enlargers is secured on the shaft by a small D-shaped spring clip. With heavy use, the plastic collar holding the clip wears or splits, at which point the knob turns with no effect and easily comes off. For school and institutional situations in which the enlargers get heavy use and this problem may reoccur, we have this heavy-duty replacement knob. The heavy-duty knob has a brass insert and is secured to the shaft by a set screw. We also normally stock the original standard knob - please see Related Products below.
Please note due to supply chain issues we may ship a part different in appearance to the knob shown in this image. The alternate knob is a direct substitute & and similar in size to the original knob. With a brass insert and retaining set screw, it is more robust in nature and should solve the problem once and for all.
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Fits the following:
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LPL 7700 series 6x7 enlargers
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Jobo/LPL 7700 series 6x7 enlargers
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Omega/LPL 670XL series 6x7 enlargers
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Saunders/LPL 670XL series 6x7 enlargers
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