SOUTH BEND HEAVY 10 DOUBLE TUMBLER QCGB LATHE METRIC TRANSPOSING Gear 100/127This Gear is for the South Bend Heavy 10 lathes equipped with Double Tumbler (Two lever) Quick Change Gear Boxes. This set will not work on a Single Tumbler Gear Box Heavy 10 lathe. Not all 3d printed gears are created equally... don't fall for the rest, BUY THE BEST!NOTE: 3d printed plastic 100/127 gear. Don't let that SCARE you!!!!The following video is of the original plastic test gears still running 1 year later. The video is of a gear NOT on a Heavy 10. It was the TEST lathe for testing gears.The reversing gears in the video "mesh" is not displayed properly due to video angle and the fact that they were the test bed for "wider offset gears" to test strength in more severe use.The reversing gears turn at higher RPM which is good for testing. At the end of this video you will see how the MESH of the plastic to the original Steel gear is still visually perfect! South Bend 3d printed gears after 1 year of use. Video will open in a new window Using the eBay App? Paste link into a browser window: [isdntekvideo] Satisfaction guaranteed!Return if not totally happy! (Buyer pays shipping costs) This Gear set is for South Bend Heavy 10 lathes equipped with Double Tumbler (Two lever) Quick Change Gear Boxes. Includes 100/127 Transposing Gear. Purchase includes the following GEARS AND SPACERS QTY 1 - 100T/127T Transposing Gear: 3/4” bore 1/2 wide gears (see below for more dimensions). 1 - 0.600" Spacer (Space out Screw Gear) 2 - 0.025" Shims (Shim out Screw Gear if needed) APPLICATION INFORMATION: SOUTH BEND LATHE Heavy-10 (Using QCGB) METRIC TRANSPOSING GEAR CHART METRIC THREADS – ENGLISH LEAD SCREW-8 THREADS PER INCH USING 56 TOOTH SCREW GEAR M/M STUD PLUNGER PLUNGER PITCH GEAR HOLE HOLE 6.00 48 A 1 5.50 44 A 1 5.00 40 A 1 4.50 36 A 1 4.00 32 A 1 3.50 28 A 1 3.00 48 B 1 2.75 44 B 1 2.50 40 B 1 2.25 36 B 1 2.00 32 B 1 1.75 28 B 1 1.50 48 C 1 1.40 28 B 3 1.30 26 B 3 1.25 40 C 1 1.20 48 C 3 1.10 44 C 3 1.00 32 C 1 0.90 36 C 3 0.80 32 C 3 0.75 48 D 1 0.70 28 C 3 0.65 26 C 3 0.60 48 D 3 0.55 44 D 3 0.50 32 D 1 0.45 36 D 3 0.40 32 D 3 0.35 28 D 3 0.30 48 E 3 0.25 32 E 1 0.20 32 E 3 DETAILS: TRANSPOSING GEAR 100T / 127T:Commonly used to transpose the feed rates on metal lathes to allow cutting of metric sized threads. Powdered Metal Bronze (SAE 841) oil impregnated bushing. There IS also an oil hole if you desire to oil directly. (Makes me feel better ;>) ) 127T Gear Width: 0.5” 100T Gear Width: 0.550” (this provides enough offset to “clear” each other an retain FULL 0.5 engagement. Bore Diameter: 0.75” (retain use of any existing bushings). Please ask questions before purchase! Have a question? Just ASK! Thank you for looking! Customer Satisfaction Guaranteed! *If you have ANY “Fit or Finish” issues, please let me know. Please, contact me BEFORE choosing to RETURN an item! I ALWAYS do whatever is required to make sure you are satisfied! I strive hard to earn your “Positive Ebay Feedback”! Kevin Dudley