Grooving Inserts

I'm attaching 3/4" plywood to my base cabinets. How do I connect the seams for optimum stability?

I've heard that you shouldn't have seams over a dishwasher, so I am going to screw both to the nearest cabinet. But what is the correct way to do this? Do I need to bevel the edges of each plywood board to fit into eachother? Or can the factory edges just sit next to one another? I need to have a flush system, but am not sure how to reinforce the base cabinet (it's very thin and I don't know if both plywood boards will be able to be screwed in). Is there a standard way to do this? Thanks so much.

I am afraid, that you need to provide some details here....

Where are you placing the plywood, and why plywood? (Are you putting down a plywood base in preperation for tile work, for example?)
How many pieces?
Is the counter in a straight line, or angled?

Typical countertop mounting to cabinet bases would mean securing the top from underneath, by shooting a screw thru the corner braces of the cabinet,up into the countertop. For added strength where necessary, a small cleat can be added on one side or the other, of the cabinet wall. I would apply some glue to the cleat, and shoot screws in from the other direction (thru the cabinet wall) into the cleat. This would give a little more room and strength, to help secure the top from underneath.
Another option, is to use countertop fasteners to secure edges together. These can be found in most building supply stores, or online, at places like Rockler. Here is a sample of what I am talking about - http://www.rockler.com/product.cfm?page=10770&filter=countertop%20fastener
There are several versions of this type of fastener available. What it does, is pull the edges together...and is a very common item in commercial cabinet manufacturing. Just a note - these are installed from the Underside of the countertop material.

Another method of joining materials... take a router, and cut a groove into both edges, and then cut a piece of wood that will almost fill that groove, but not quite... This is called making a spline. Squeeze some glue (titebond works very well for this) into the grooves, insert the spline(s), and then use the 'zip bolt' to tighten them together. I say 'splines' because you do not want the spline where the zip bolt is at.
If you have a 'biscuit joiner' on hand, then that can be used instead of the router -- simply pop some biscuit joints at several places along the edges, glue, and insert the biscuits. (Biscuit joints can be cut with the special cutter, or router, with the appropriate router bit)
While at Rockler, just do a search on "Biscuit", and you will see several items pop up.

And of course, there is always the dowel :)

Let me know a little more about what you are attempting to do, be glad to help :)

Good Luck

Discover Grooving Inserts On eBay Below:

MGEHR1212 3 Lathe Cut Off Grooving Tool Holder With 10pcs MGMN300 Inserts
MGEHR1212 3 Lathe Cut Off Grooving Tool Holder With 10pcs MGMN300 Inserts
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Drillpro 10pcs MGMN200 G 2mm Carbide Inserts for MGEHR MGIVR Grooving Cut Off
Drillpro 10pcs MGMN200 G 2mm Carbide Inserts for MGEHR MGIVR Grooving Cut Off
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10pcs TNMG160408 TNMG332 Milling cutter blade alloy carbide inserts with groove
10pcs TNMG160408 TNMG332 Milling cutter blade alloy carbide inserts with groove
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NIKCOLE GIE 7 GP 20 Carbide Groove  Cut Off Insert Grade C5 PV LH NeutPack 2
NIKCOLE GIE 7 GP 20 Carbide Groove Cut Off Insert Grade C5 PV LH NeutPack 2
$38.02
Interstate Carbide Grooving Insert TNMA32 Grade TCN55 Box of 6 44015
Interstate Carbide Grooving Insert TNMA32 Grade TCN55 Box of 6 44015
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Tungaloy 6829860 Carbide Grooving Insert GE30 AH120 Box of 10
Tungaloy 6829860 Carbide Grooving Insert GE30 AH120 Box of 10
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10 GROOVING INSERTS INSERTS xgr6330 02 NS530 Von TUNGALOY NEW H1604
10 GROOVING INSERTS INSERTS xgr6330 02 NS530 Von TUNGALOY NEW H1604
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10 pcs MGMN300 M LDA Carbide Inserts Grooving Parting FOR CNC Stainless steel
10 pcs MGMN300 M LDA Carbide Inserts Grooving Parting FOR CNC Stainless steel
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55 542 213 G Carbide Grooving  Cut Off Insert Grade C5 PV INSERT CUTTING W
55 542 213 G Carbide Grooving Cut Off Insert Grade C5 PV INSERT CUTTING W
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10pcsSandvik Coromant carbide inserts for parting grooving N1502 300 5E GC435
10pcsSandvik Coromant carbide inserts for parting grooving N1502 300 5E GC435
$45.00
2707 Precision Grooving Inserts Grade VP5820 INSERT CUTTING WIDTH  0130
2707 Precision Grooving Inserts Grade VP5820 INSERT CUTTING WIDTH 0130
$16.00
VR WESSON NG 4256R 1 16 CR CARBIDE GROOVING INSERTS 10 PCS
VR WESSON NG 4256R 1 16 CR CARBIDE GROOVING INSERTS 10 PCS
$40.00
2 Horizon HTN HB062204 01 323FG 1095 Top Notch Style Carbide Grooving Inserts
2 Horizon HTN HB062204 01 323FG 1095 Top Notch Style Carbide Grooving Inserts
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2 Horizon VDB 304B 015C 323F304 Dog Bone Style Carbide Grooving Inserts
2 Horizon VDB 304B 015C 323F304 Dog Bone Style Carbide Grooving Inserts
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10 PCS NEW SANDVIK TM1512 4G01 302222 A13A K20 M15 GROOVING CARBIDE INSERTS
10 PCS NEW SANDVIK TM1512 4G01 302222 A13A K20 M15 GROOVING CARBIDE INSERTS
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10 ISCAR GMP 120 000 IC328 Carbide Grooving Inserts New Ships Free
10 ISCAR GMP 120 000 IC328 Carbide Grooving Inserts New Ships Free
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Sandvik TMTL TLR 245254 1015 125 Wide Full Radius Carbide Grooving Insert
Sandvik TMTL TLR 245254 1015 125 Wide Full Radius Carbide Grooving Insert
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5 Sandvik 009210R74 225 125 Wide Carbide Cut Off Grooving Inserts
5 Sandvik 009210R74 225 125 Wide Carbide Cut Off Grooving Inserts
$25.99
NIKCOLE GIE 7 GP 10 Carbide Groove  Cut Off Insert Grade C6 PV LH NeutPack 2
NIKCOLE GIE 7 GP 10 Carbide Groove Cut Off Insert Grade C6 PV LH NeutPack 2
$38.02
Iscar AI16 15 IC656 New Carbide Grooving Inserts Qty2
Iscar AI16 15 IC656 New Carbide Grooving Inserts Qty2
$15.00
5 Indexable inserts Grooving inserts inserts 140R L4 BIMU SA New A827
5 Indexable inserts Grooving inserts inserts 140R L4 BIMU SA New A827
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Walter Valenite VLG3094 VC5810 0094 Carb Dbl Grooving Inserts Qty 6 23562
Walter Valenite VLG3094 VC5810 0094 Carb Dbl Grooving Inserts Qty 6 23562
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Iscar GMP 240 MT005 IC250 Carbide Grooving or Threading Insert Qty 4
Iscar GMP 240 MT005 IC250 Carbide Grooving or Threading Insert Qty 4
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NEW 5 PCS KENNAMETAL TOP NOTCH CARBIDE GROOVING INSERTS NR4062LK GRADE KCU25
NEW 5 PCS KENNAMETAL TOP NOTCH CARBIDE GROOVING INSERTS NR4062LK GRADE KCU25
$49.99
NEW 5PCS KENNAMETAL TOP NOTCH CARBIDE DP GROOVING INSERTS NGD4250LK GRADE KC730
NEW 5PCS KENNAMETAL TOP NOTCH CARBIDE DP GROOVING INSERTS NGD4250LK GRADE KC730
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10 NEW Kennametal Carbide partoff grooving Inserts GS125I KC720 grade
10 NEW Kennametal Carbide partoff grooving Inserts GS125I KC720 grade
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4 Sandvik TLGP 2031L 4125 Carbide Groove Inserts
4 Sandvik TLGP 2031L 4125 Carbide Groove Inserts
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NEW 5PCS KENNAMETAL TOP NOTCH CARBIDE GROOVING INSERTS NR4094L STEEL GRADE KC850
NEW 5PCS KENNAMETAL TOP NOTCH CARBIDE GROOVING INSERTS NR4094L STEEL GRADE KC850
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NEW 5PCS KENNAMETAL TOP NOTCH CARBIDE GROOVING INSERTS NR3094L STEEL GRADE KCU25
NEW 5PCS KENNAMETAL TOP NOTCH CARBIDE GROOVING INSERTS NR3094L STEEL GRADE KCU25
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Iscar Tri 16rk 40 02 6003238 Ic908 Triple edged Groove Milling Inserts Qty 10
Iscar Tri 16rk 40 02 6003238 Ic908 Triple edged Groove Milling Inserts Qty 10
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NEW 5PCS KENNAMETAL TOP NOTCH CARBIDE GROOVING INSERTS NG2125L STEEL GRADE KCU25
NEW 5PCS KENNAMETAL TOP NOTCH CARBIDE GROOVING INSERTS NG2125L STEEL GRADE KCU25
$34.99
10 TOOL FLO BTGR 031W CARBIDE GROOVING INSERTS GP22 GRADE
10 TOOL FLO BTGR 031W CARBIDE GROOVING INSERTS GP22 GRADE
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NEW 4PCS KENNAMETAL TOP NOTCH CARBIDE GROOVING INSERTS NR3078L STEEL GRADE KCU25
NEW 4PCS KENNAMETAL TOP NOTCH CARBIDE GROOVING INSERTS NR3078L STEEL GRADE KCU25
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Aloris SGIH Cut Off Grooving Blade Insert Regular Style SGIH 26 5
Aloris SGIH Cut Off Grooving Blade Insert Regular Style SGIH 26 5
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Aloris SGIH Cut Off Grooving Blade Insert Regular Style SGIH 32 6
Aloris SGIH Cut Off Grooving Blade Insert Regular Style SGIH 32 6
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Sandvik Coromant CoroCut 2 Edge Carbide Grooving Insert GM Geometry H13A Grade
Sandvik Coromant CoroCut 2 Edge Carbide Grooving Insert GM Geometry H13A Grade
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1 Kennametal NR4125LK Carbide Grooving Insert KC935 groove slot
1 Kennametal NR4125LK Carbide Grooving Insert KC935 groove slot
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1 Kennametal NR4062L Top Notch Carbide Grooving Insert KC850 groove slot
1 Kennametal NR4062L Top Notch Carbide Grooving Insert KC850 groove slot
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NIB Sandvik Coromant Carbide Grooving Inserts LPE444 NT 10 Grade C5A 10 Pack
NIB Sandvik Coromant Carbide Grooving Inserts LPE444 NT 10 Grade C5A 10 Pack
$20.00

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