Specification Brand : Generic BulletPoint1 : This belt gear/pulley kit will replace existing belts and gears... especially those that use obsolete OEM belt. BulletPoint2 : ** Small gear does not have a keyway ** fits Cummins, Speedway Series CT0618-300 / CJ0618-200 12" / 8" **Grizzly 8690 uses 15mm bore large gear...please let me know if this is your model** **SIEG C2 &C3 ** you will need to modify for this to work BulletPoint3 : 5278 Cummins 7x12 Mini Lathe 82500 Micro-Mark 7x12 Mini Lathe 82710 Micro-Mark 7x14 Mini Lathe G8688 Grizzly 7x12 Mini Lathe Grizzly G8690 BulletPoint4 : ..and other units ..see below. Fits Asian Mini Lathe 7" x 10",12",& 14","Pulley/Belt Reduction Power UpGrade, Aluminum XL Pulleys & Belt, Approx 3 to 1 Reduction instead of the OEM 1.82 to 1, 40% Power increase, Ideal for spinning those 4 & 5 Inch Chucks, “ BulletPoint5 : **This upgrade lowers Max RPM in Low Gear to Approx. 700 RPM, and 1600 RPM in High Gear.** CompatibleDevices : Lathe ExternallyAssignedProductIdentifier : 7354395308337 ExternallyAssignedProductIdentifier1 : 0376282366272 ExternallyAssignedProductIdentifier2 : 376282366272 ItemName : NEW SET for Asian Mini Lathe 7x10,12,14 Gear Belt Kit Grizzly 8690 and others ItemPackageDimensions_Height : 2 centimeters ItemPackageDimensions_Length : 13 centimeters ItemPackageDimensions_Width : 9 centimeters ItemTypeKeyword : power-metal-lathes Manufacturer : Nobrend Material : Polyurethane (PU) ModelNumber : Shanrya6uCplykh NumberOfItems : 1 PartNumber : Does not have ProductDescription : Specification: Item Type: Lathe Belt Model: 1.5M x 94 Teeth Colour: Transparent Material: Polyurethanen