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2nd August 2021, 09:50 AM #1
Thos. White SO "Rapid Crosscut Saw"
This weekend I became the owner of a White SO saw.
White1.jpg White2.jpg Seller's photos.
Bought unseen, with just a couple of photos from the LH side. The seller said it takes a 16" blade - which suggests it's a No.1 (18" blade).
White3.jpg Pikkie curtsey of Allison74.
The SO is effectively a radial arm saw - without the radial arm. Very ingenious "Watts" linkage.
It was collected for me and is in storage in west Auckland where it will stay for the foreseeable future (no room in my garage/workshop at present). I've had a yearning for one of these interesting machines since I first saw one in a museum a few years ago. I think I've become a collector... .
Cheers, Vann.Gatherer of rustyplanestools...
Proud member of the Wadkin Blockhead Club .
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2nd August 2021 09:50 AM # ADSGoogle Adsense Advertisement
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2nd August 2021, 10:37 AM #2SENIOR MEMBER
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Nice one Van, I came across one of these bad boys when I was looking at a Thomas White Chain & Chisel Mortiser. Is this machine original or has it been restored at some point? Looks very tidy!
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2nd August 2021, 10:49 AM #3
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2nd August 2021, 11:43 AM #4
Nice looking saw Vann . Id love to have a go on one of these one day to see how they feel, such a different approach to the more usual way of a typical RAS. Ive never seen one yet . I look forward to hearing what you think of it after you get to use it .
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2nd August 2021, 05:37 PM #5
Catalogue Cuts.
Here's a photograph of the relevant pages from a catalogue held at the NZ Timber Museum, SH1 Putaruru.
SO cat.jpg
And a brochure from Scott & Sargent's website.
SO-11.jpg
SO-12.jpg
Cheers, Vann.Gatherer of rustyplanestools...
Proud member of the Wadkin Blockhead Club .
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4th August 2021, 05:35 AM #6Senior Member
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Swing saws - the American term for this type of saw - are considered fairly hazardous here in the U.S. I've never quite known why, unless it's how easily it can swing out - if your blade has too extreme a rake, the blade could drive it out pretty fast.
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4th August 2021, 11:20 AM #7
These type of saws just look like they belong in some sort of Horror movie .... Although this looks to be a more compact design than what other manufacturers seemed to have made. There is a Robinson version for sale up in Mackay at the moment and a rather sad version made by Thornley down in Melbourne.
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4th August 2021, 12:05 PM #8
I don't know, but I'm not sure this is a real swing saw - or more likely it's a double swing saw, with the bottom arms to counter the swing of the top arm. This would also balance the effect of gravity as the top arms swing the saw down, the bottom arms swing the saw up. I believe it does swing forward more easily than a radial arm saw - and having played with its bigger brother, the SO No.2 (26" blade) at the Timber Museum I can tell you the two sets of arms moving through their respective arcs, gives a really weird motion (and apparently a straight cut).
I guess the blade should have a neutral or negative rake like a radial arm saw blade. I'm keen (impatient even) to see what blades I got with it.
Originally Posted by Gaza58
Cheers, Vann.Gatherer of rustyplanestools...
Proud member of the Wadkin Blockhead Club .
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4th August 2021, 06:18 PM #9
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4th August 2021, 08:24 PM #10
Tags.
A little more info gleaned from my nephew (who's storing the saw).
The machine tag:
White SO M23247FI.jpg Ref No. M23247F1.
And the motor tag:
White SO motor.jpg
The HP and RPM ratings confirm this is the smaller No.1 (18") size SO.
There's no indication of who the motor manufacturer is - but the Type "WKT 26/26" is also to be found on my 4hp Wadkin PK motor, which has BTH (British Thomson Houston) rotor and stator. Many other BTH motors I've looked at also have that "WKT" designation.
White NJ.jpg Two identical tags on a White NJ chain & chisel mortiser, that Andrew Hills thinks is 1950s.
SO Put3.jpg Tag on the SO No.2 at the Timber Museum - looks like an older style to me.
Cheers, Vann.Gatherer of rustyplanestools...
Proud member of the Wadkin Blockhead Club .
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8th August 2021, 01:45 PM #11
T'other Side.
I managed to nag my nephew into sending me a couple more pictures.
SO-15.jpg Saw retracted (back position).
SO-14.jpg Saw fully extended (forward position).
I'm not sure what those lose wires are about. Hopefully just restraining the linkage from swinging during transport - and not dodgy electrical wiring .
SO-16.jpg
Looks like the "Off" button is beyond its 'best before' date. I'll have to see if I can find a less modern button station in my bits and pieces box. That'll give me the incentive to check out the wiring at the same time. Nice brass brake lever at the RH end of the motor.
Cheers, Vann.Gatherer of rustyplanestools...
Proud member of the Wadkin Blockhead Club .
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8th September 2021, 09:03 AM #12
I Found the Video.
I found it! I knew I'd taken a video of it - I found it on my phone where it's been hiding for a couple of years.
White SO Saw - YouTube
Sorry about the poor quality and focus .
Cheers, Vann.Gatherer of rustyplanestools...
Proud member of the Wadkin Blockhead Club .
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23rd March 2022, 05:08 PM #13
Electricals.
In November Auckland was in covid lockdown. I final got to Auckland in mid February. Unfortunately my nephew was away, nevertheless I did go and briefly look at the saw.
The seller screwed me over on that one. The sale included a stack of blades - four of which were tungsten-carbide tipped.
SO-13.jpg
But when my nephew picked up the saw he was only given 4 blades - none of them tungsten-carbide tipped .
Anyway, while I was there I had a look at the electricals. The saw has a switchgear cabinet just above the base. From there a flexible steel-clad cable goes up inside the curved mainframe then pops out the top and goes down the back of the upper arm to the On/Off pushbuttons (yellow line). When the On button is pushed the contactor in the switchgear locks on and livens a second flexible steel-clad cable which also goes up inside the curved mainframe and goes down the back of the upper arm to the motor (blue line).
SO 1.jpg
I expected to find "Brookhirst" switchgear in the cabinet, but instead found this - which looks very similar to this 1931 "Igranic" advert.
SO 2.jpg Igranic switchgear.png
A closer look.
SO 3.jpg "366" - whatever that means (model number?).
Igranic and Brookhirst merged in 1960.
And this is the terminal box on the motor. Six wires suggests the motor can run on two voltages (though there's no indication of that on the motor tag).
SO 5.jpg
Cheers, Vann.Gatherer of rustyplanestools...
Proud member of the Wadkin Blockhead Club .
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23rd March 2022, 05:20 PM #14GOLD MEMBER
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23rd March 2022, 09:08 PM #15
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