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girdle. 0.50. 1.00. 0.50. Shutter body. 0.50. 2.051. 1.025. 0.50. 0.065. 3.61. 0.12. 0.125. girdle (new In 2002). 1.00. 3.10. 0.50. 3.11. interference is about 0.015. OD = 3.75. 0.06. 3.37+2 * 0.12 = 3.61 vs 3.625. shutter. bottom lip (new in 2002). 0.062. 3.37. 0.18.

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  1. girdle 0.50 1.00 0.50 Shutter body 0.50 2.051 1.025 0.50

  2. 0.065 3.61 0.12 0.125 girdle (new In 2002) 1.00 3.10 0.50 3.11 interference is about 0.015 OD = 3.75 0.06 3.37+2 * 0.12 = 3.61 vs 3.625 shutter bottom lip (new in 2002) 0.062 3.37 0.18 0.12? 0.20

  3. Dimensions Blue: directly from E-MIT-46 + E-MIT052 green: inferred from difference and/or photo red: uncertain. Need to verify with more photos 0.065 3.61 Proposal: position shutter off-center with respect to turret (using Vespel bushing) to provide additional clearance at L1 ‘snout’ 0.12 0.125 (guess / photo) girdle (new In 2002) 1.00 (photo) 3.10 0.50 (photo) 3.11 shutter 3.051 OD = 3.75 3.37+2*0.12 = 3.61 vs ID=3.63. So nominal clearance between button and shutter is 0.010”. ID = 3.63 0.06 (difference) clearance = 0.13 (difference) snout for L1 lens holder sticks out maybe 0.12-0.14  interference 0.10 – 0.12 (photo) 0.06 (photo + difference) 3.37 bottom lip (new in 2002) 0.18 0.128 (difference) 0.16-0.18 (photo / difference) Need to check this) 3.625

  4. turret girdle L-1 lens to plasma shutter ‘elbow’ Is there value in adding a vertical ‘lip’ to ensure that shutter can’t be pulled away from the turret? Vespel SP-3 “L”-bushing

  5. turret girdle L-1 lens to plasma shutter ‘elbow’ Vespel SP-3 “L”-bushing

  6. Offset joint at two halves of shutter From joint of Vespel bushings T-clip Vespel bushing Vespel bushing Shutter body (right half) Shutter body (left half) turret

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