Jet Tools 720HD, M-1791309 Grounding Instructions, Installing Bushing, Chisel and Auger

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Installing Bushing, Chisel and Auger

1.The mortiser should be disconnected from power source.

2.Open the chuck access cover (A, Figure 3).

3.Insert a bushing (B, Figure 3) into the hole with the bushing’s hole facing the front toward the set screw (C, Figure 3).

NOTE: The Mortiser is shipped with the 5/8” bushing pre-installed.)

4.Tighten the set screw (C, Figure 3) with a 4mm hex wrench just enough to hold bushing in place.

5.Place the chisel (D, Figure 3) and auger (E, Figure 3) beneath the bushing and allow the auger to rest upon the table while pushing the chisel up through the bushing.

6.The cutting portion of the auger must clear the chisel by about 1/16” to 3/16”, depending upon the type of wood to be worked. Place a “spacer” of 1/8” to 3/16” diameter (a hex wrench works well) between bushing and chisel, and push chisel up until it contacts the spacer.

7. Tighten the set screw (C, Figure 3) to hold the chisel in place, and remove spacer.

8. Push the auger up through the chisel opening and into the chuck as far as it will go. Tighten the auger in the chuck using the chuck key.

Figure 3

9. Loosen the set screw (C, Figure 3) and push the chisel all the way up until it contacts the bushing. This should provide the proper distance so that the cutting portion of the auger clears the chisel. Tighten the set screw (C, Figure 3).

NOTE: Set the slot in the side of the chisel to the left or right, if the cut is to be done laterally; and front or back if the cut is to be done front to back. The chisel slot should always be positioned so chips are being released into the already-cut part of the workpiece.

10. Close the chuck access cover (A, Figure 3) before operating.

Grounding Instructions

Electrical connections must be made by a qualified electrician in compliance with all relevant codes. This machine must be properly grounded to help prevent electrical shock and possible fatal injury.

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Contents Part No. M-1791309 Heavy-Duty MortiserMore Information WMH Tool Group Warranty Warranty and ServiceTable of Contents Page Page Introduction Specifications Unpacking Contents of the Shipping ContainerInstalling Handle AssemblyInstalling Wood Table Tools required for assemblyGrounding Instructions Installing Bushing, Chisel and AugerFeet 12 to 15 to 21 to Extension cordsSetting Table to Vertical Position AdjustmentsSquaring Table To Chisel Table Removal and StorageDepth Setting Rod Chuck Extension AdaptorHead Movement Setting Lateral Stops ClampStock Stop Gib Adjustment Re-setting the HeadChisel Parallel to Workpiece Lower Work SupportTool Storage Operating ControlsGib for Front-to-Back Movement Gib for Lateral MovementOperation MaintenanceLubrication Sharpening Chisel and AugerChisel AugerReplacement Parts TroubleshootingTrouble Probable Cause Remedy720HD Heavy Duty Mortiser Index No. Part No Description Size Qty Parts List 720HD Heavy Duty MortiserETW-7 720HD-1116 Electrical Connections WMH Tool Group