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Draining Groove Jig

Draining Groove Jig
  Introduction
Creating draining grooves in solid timber worktops for Belfast sinks is easier than you think when you use the Trend Draining Groove Jig. By following the simple stages detailed below, an excellent draining board can be achieved.

Draining Groove Jig
  Positioning Jig on Worktop
Decide if grooves are required on the left or right or both sides of the sink, and mark the worktop accordingly.
Using the jig as a guide mark the first and last groove position. The groove pitch (centre to centre) is 50mm. The nearest edge of the first groove must be a minimum of 100mm from the front edge of the worktop. The grooves should be ideally equidistant to the sink aperture, but this will be dictated by the sink size. Double check pencil mark positions of grooves and adjust if necessary.
Position the jig on the worktop to the marked pencil lines, then using the sight marks on the jig, align the marks to the edge of the worktop. Re-check position.
Clamp jig to the worktop using three clamps, ensuring the clamps will not foul the router base and that clamps are inboard of the rails. Do not clamp on the very edges of the jig.
The clamps may need to be repositioned for grooves towards the front and back of the jig. If clamping towards the end of the slots, ensure the top of the template does not lift.

Draining Groove Jig
  Setting the Depth of Cut
Set the router with guide bush fitted into one slot and position router to the shallow end of the jig ensuring that the worktop can be seen below the cutter.
Plunge router down until the cutter is just touching the worktop.
Set the router depth stop 4mm (maximum 4.5mm deep).
A 0.5mm difference in depth of cut can make a considerable difference to the width of finished groove.
Draining Groove Jig
  Routing the Groove
Release plunge and reposition router in first slot at sink end.
Hold router against the far edge of the template slot (towards top of jig).
Switch on router and plunge to height setting. Rout the groove feeding up the slope away from the sink-end using a slow feed. The slot in the jig will limit the length of the groove. The groove depth in the worktop will get shallower.
At the end of the cut move the router against the near edge of the slot and rout back down the slot towards the sink. The slots are 0.2mm oversize to allow for return pass. Ensure the router cutter passes out of the wood at the sink end.
Release plunge and switch off router.
Repeat this operation for each slot in the jig as required.
Before removing the jig, check all slots are routed to the correct length and correct depth. If any of the grooves are not correct, adjust the depth of cut accordingly and re-cut.
Remove clamps and remove jig.
Depending on the groove arrangement the first slot on the jig front may not need to be used.

Draining Groove Jig
  Shorter Length of Groove
The groove length can be made shorter to approximately 300mm long by fixing a user made batten (12mm thick, 50mm wide x 500mm long) to the top of the jig. This batten will deliberately restrict the movement of the router. The batten position will need to be calculated by the user as it will vary depending on the make and model of the router used. The batten should be placed on top of the jig and secured from underneath using screws through the holes in the jig body.

User Made Stop
For repetitive work, two user made stops can be made and fitted to the front edge of the slots. The jig has two fixing holes to accept No.8countersink screws for each stop. The stops should be made from 18mm thick MDF, size 50mm wide x 100mm long. Line up edge of the stops to the sight line and secure with countersink screws. The first time the stops are used, the router cutter will need to plunge into the stop.
A hex key is supplied if tapered rails need to be removed. When refitting ensure the tapered rails are the correct way round.

Finishing the Draining Groove
When routing is complete, remove any rough edges with fine grade abrasive paper.
Finish and seal the worktop with appropriate sealer, following the worktop manufacturerÕs instructions.

     
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