• We invite you to join UKWorkshop.
    Members can turn off viewing Ads!

160 Half lap joints ?

UKworkshop.co.uk

Help Support UKworkshop.co.uk:

rth

Established Member
Joined
8 Aug 2012
Messages
34
Reaction score
0
Location
sitting room
Hi folks, I need some advice on the following please..

I have to cut 160 half lap joints in softwood 45 x 145 x 6000mm, it is too time consuming and downright difficult to attempt by hand therefor I'm thinking of a radial arm saw, does anyone know of such a machine with a cutting depth of at least 80mm or another method of doing the job, thanks.
 

paulm

IG paulm_outdoors
Joined
25 Sep 2005
Messages
3,471
Reaction score
50
Location
North Hampshire
Could you gang a few pieces together at a time and use a router and jig/guide ?

Cheers, Paul
 

Steve Maskery

Established Member
Joined
26 Apr 2004
Messages
11,795
Reaction score
142
Location
Kirkby-in-Ashfield
Cross-cut the shoulders first, then bandsaw off the waste. With a blade from Ian John at Tuffsaws you should get a finish that is ready for gluing.

Or cut the waste off vertically on the tablesaw. You will need alternative guarding and a jig to hold it upright, but that is quite straightforward. That is assuming, of course, that have mis-typed the length. Are you really handling piece 6metres long? If so, scrap the TS idea!

Steve
 

rth

Established Member
Joined
8 Aug 2012
Messages
34
Reaction score
0
Location
sitting room
Thanks for the replies, the joints are 300mm from the end, the cut is 72.5mm, ie half the depth


I would have posted a picture but my"account" on here will not allow it...........unfortunately, a picture paints a thousand words...when allowed..

PS The length IS 6 metres with a joint at each end
 

Steve Maskery

Established Member
Joined
26 Apr 2004
Messages
11,795
Reaction score
142
Location
Kirkby-in-Ashfield
Ah, so they are not all at corners. That precludes the bandsaw idea.
RAS with a dado set then ( or LOTS of cuts with a thin-kerf blade.....)
:)
Steve
EDIT - Even that is not going to be easy, is it? It would mean using the blade to a 3" depth of cut and most dado sets won't do that.
I think you are going to have to cut the shoulders with a RAS and then just belt out the waste with a mallet and chisel. Think how fit you'll get!
 

RogerP

Established Member
Joined
7 Jan 2011
Messages
3,785
Reaction score
2
Location
Gloucester
rth":3ur81cf5 said:
I would have posted a picture but my"account" on here will not allow it...........unfortunately, a picture paints a thousand words...when allowed..
One more post, to make 3, then from your 4th you'll be able to post pictures .......
 

jasonB

Established Member
Joined
26 Nov 2004
Messages
5,044
Reaction score
1
Location
Surrey
Clamp 10-12 of them together and then use a circ saw against a straight edge to cut the two sides then either keep sawing to chew out the waste or knock most out with a chisel and then run the saw through to level the bottom of the cut.

J
 

rth

Established Member
Joined
8 Aug 2012
Messages
34
Reaction score
0
Location
sitting room
RogerP":3gp2i56u said:
rth":3gp2i56u said:
I would have posted a picture but my"account" on here will not allow it...........unfortunately, a picture paints a thousand words...when allowed..
One more post, to make 3, then from your 4th you'll be able to post pictures .......
Here's to number 4 then and the picture the nation has been waiting for... :D
 

RogerP

Established Member
Joined
7 Jan 2011
Messages
3,785
Reaction score
2
Location
Gloucester
rth":2ltiudsu said:
RogerP":2ltiudsu said:
rth":2ltiudsu said:
I would have posted a picture but my"account" on here will not allow it...........unfortunately, a picture paints a thousand words...when allowed..
One more post, to make 3, then from your 4th you'll be able to post pictures .......
Here's to number 4 then and the picture the nation has been waiting for... :D
Great! Go for it :)
 

rth

Established Member
Joined
8 Aug 2012
Messages
34
Reaction score
0
Location
sitting room
from the pic you see the problem, a 72.5 depth of cut..............some good advice here though, I like the dado blade idea and clamping a few together will help in alignment, many thanks..

 

James C

Established Member
Joined
19 Dec 2011
Messages
448
Reaction score
0
Location
Wolverhampton
Am I mistaken is a half lap joint the same as a cross halving joint? Or am I using an Americanism?
 

Steve Maskery

Established Member
Joined
26 Apr 2004
Messages
11,795
Reaction score
142
Location
Kirkby-in-Ashfield
Ah, James, I'm glad it's not just me!
I originally had envisaged a corner joint, half and half. I know that as a lap joint. The picture shows what I know as a cross-halving joint. I dare say they both have other names in other places.. Hence the confusion over using a bandsaw...
S
 

James C

Established Member
Joined
19 Dec 2011
Messages
448
Reaction score
0
Location
Wolverhampton
I did a quick search and half lap seems to bring up a bunch more american sites than uk ones and cross halving seems to be more our side of the pond.

I may be wrong though.
 

rth

Established Member
Joined
8 Aug 2012
Messages
34
Reaction score
0
Location
sitting room
MickCheese":3a9qxjhm said:
What are you making, a log cabin?

Mick
Well done, I am chucking this up........
and making a garage to suit from 100mm x 180mm x 6m timber hence the joints.
 

rth

Established Member
Joined
8 Aug 2012
Messages
34
Reaction score
0
Location
sitting room
Being new here I am not too sure what can be posted but if it is alright I will add posts when I get started on the house ?
 
Top