CMS-Japanese Motorcycle Supply Parts

Durst Super Bench Grinder Restoration Review


Before using this site please read the site disclaimer. Also please note that any links provided may be part of an affiliate programme (viz. eBay, Amazon) which helps support the site as I will earn a commission when visitors make a qualifying purchase.


Today I am restoring an uncommon Australian vintage bench grinder - a Durst Super 8" unit. For some info on the history of the company, see see this article. Here it is in the flesh:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

I don't think the brown paint is stock.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Looks like it may have been repainted while attached to a bench and only the easy to reach areas received some paint.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

The underneath:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

The foot casting seems to have part number D243:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

A capacitor (see lower for specs):

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Rear of the switch:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

After loosening the pinch bolts on the inside of the foot, the shafts on either side slide out:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Each of the end guards are held on by three screws:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

The nuts were 15/16" AF:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Thread pitch:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

I did measure the shaft OD, I will add that when I find it.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Some penetrant was required to loosen this:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Once removed:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

The hole was presumably drilled for balance:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

The inner guard is held on by four screws:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Once the guard is removed, we can see the shielded bearing and a bunch of grit:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Grit removed:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

The left end has a circlip visible outside the bearing:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

The end caps that hold the bearings are held together by threaded shafts with an acorn nut on either end:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Once they are undone, the end cap can be pulled off - I started with the right as it came off easily leaving the bearing in place:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

The left side came out along with the shaft, leaving this:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Circlip removed:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Another smaller circlip:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

The shaft could now be removed from the bearing. There's another circlip on the inside:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Other shots of the left end:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

The bearings were the same on either end - made in Australia, shielded units:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Dimensions:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

They're a standard size, even today - 6204 (eBay US, eBay AU) which are available relatively inexpensively. The bearings I took out were double shielded - ZZ - and given the amount of grit which accumulated inbetween the guard and bearing I replaced them with 2RS type (double sealed) to prolong the bearing life. The slight friction between the seal and bearing resulted in the grinder spinning down slightly quicker once turned off - though that effect will lessen in time as the seal wears in. No temperature difference was discernible after changing to sealed.

The front plate is held on by hammer drive screws:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Given the overspray on the shaft and the presence of this colour under the plate I'm going to say this is the original colour:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

The rear of the switch:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

The ground wire was attached here:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Plate unscrewed:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

The capacitor is held in by a single screw:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

A Japanese-made oil SEC (source energy capacitor) of 5MFD and 330VAC rating. Some more photos of the electricals:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

The foot and center piece are held together by two bolts:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Once cleaned up and the bearings replaced, I put some paint on:

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Partially reassembled (shafts are in backwards, were just put in place for the photo!):

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

Here is a restoration of a Durst Electrical Bench Grinder - the Superior model, with 8 inch wheels. Australian made.

More photos to come.

The serial number is 61378 - perhaps the 378th Super grinder produced in 1961? Could be totally unrelated to the year of manufacture.

So far the grinder has been stellar - it's rated to 3/4hp @ 2850rpm, and draws 3 amps. It has functionally replaced my newer Chinese-made Abbott and Ashby in the workshop and has not missed a beat in six months of regular use. I'd be very keen to hear about or see any other Durst tools you happen to have - please drop me a line if you can send any info through! The fact that it uses standard, inexpensive and readily-available bearings is a good thing for anyone who intends on keeping their grinder running long-term.



Search MotoFaction:
 



Follow us on Facebook!

Follow us on Instagram!


CMS-Japanese Motorcycle Supply Parts

Search MotoFaction:
 


In 2019 the server has had to double in capacity to support the growing site... please consider dropping the site a donation to help cover the costs! Check out our Patreon for support options, buy a shirt, buy our apps, use my NordVPN affiliate link to sign up to their service or donate via Paypal:

Paypal $5 link ->>
Paypal $10 link ->>