Harbor Freight Tools 44859 operating instructions

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The Fixed Shaft Bolt (825) under the spindle is used for right hand cutting and threading. The set of Fixed Shaft Bolts in the accessory kit is used in combination with the original set of Shaft Bolts to reverse the rotation of the long leadscrew for left-handed threading and cutting.

The change gear for metric or inch threading is selected according to the Thread to Gear formula and table. The feed amount depends on the material to be cut, the surface rough- ness, and finish requirements. If the two settings “0.1 and 0.2”, of the Gear table do not meet the requirement, you can add or change gears. The same is true if the number of teeth listed in the Gear table do not coincide with the calculated number of teeth. In this case, use gears with similar number of teeth. In doing so, however, the following relation- ship of the driving shaft must be met: Z3+Z4+>Z2+Z5. Otherwise, the addendum of circles A2 and Z5 will hit each other.

The left formula below is an example of 0.3 mm spindle round. The right formula is an ex- ample for 8 threads per inch.

The Thread to Gear settings table on the following page allows you to select the number of threads per inch or millimeter, and which gears need to be used.

SKU 44859

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Contents For technical questions or replacement parts, please call Distributed exclusively by Harbor Freight ToolsSpecifications Safety Warnings and PrecautionsRead all instructions before using this tool Save This ManualPage Unpacking Controls InstallationOperation Lathe Safety Precautions Cutting ProceduresMachining Threads Machining CylindersMachining Cones Page Maintenance Rest AccessoriesGeneral LubricationLubrication Points Part to be Lubricated Lube PointSKU Headstock Parts List Item # Name QTY RemarksHeadstock Assembly Drawing Motor and Pulley Drive Parts ListItem # Name QTY Remarks Motor and Pulley Drive Assembly Drawing Bed Parts List Bed Assembly Drawing Tailstock Parts List Tailstock Assembly Drawing Rest Parts List Rest Assembly Drawing Saddle Parts List Saddle Assembly Drawing Apron Parts List Apron Assembly Drawing Gear Box Parts List Gear Box Assembly Drawing Drive System Parts List Item # Name Roller Bearing Parts List Drive System and Roller Bearing Assembly Drawing Limited 1 year / 90 Day warranty For technical questions and replacement parts, please call