Jul 10, 2017 - 6), Australia (No. 7) and Brazil (No. 8) playing each other in a round-robin format. Australia will open their campaign against the hosts in Seattle. Newsletter Signup. Be the first to get all the latest news, information on events and offers from Myford Tools!
Lathe carriage
Again the visual inspection is very important. First check the top slide of the saddle where the cross slide sits. On Super 7 and 254 lathes the saddle is scraped to the cross slide, look at the condition of the scraping marks. If the cross slide has worn a groove in the saddle then the saddle will be scrapped, as it cannot beheld in the jig to regrind the underside, as in bed and saddle grinding.
Take a firm hold of the toolpost stud, to determine if there is back to front movement in the cross slide (see photo). This will indicate the backlash in the feed screw and nut. If there is excessive movement you may not be able to adjust it out and a new feed screw and nut will be required (if the toolpost stud is loose in the top slide top a replacement casting will be required). Visually inspect the condition of the cross slide and top slide tops, check the condition of the tee slots. Look at the jib adjusting screws, if in poor condition it may also indicate a hard life.
Procedures used in factory carriage rebuilding
All models
Regrind the tops of both cross slide and top slide. Refit the toolpost stud and fit a new anti torque in a new position. When re-assembled check for facing cut against alignment jig. The nominal thickness of the shears
Leadscrew and apron
A visual inspection is all that’s needed. Compare the leadscrew’s centre section where most of the work is done with that at the back of the machine. Are the threads worn or are they becoming ‘sharp’? If there appears to be too much play in the saddle when the leadscrew is engaged a pair of half nuts will often bring the play back within tolerances.
Procedures used in factory re-assembly of apron
Super 7 and ML7 Non-Powerfeed
Fit new rack pinion and hand traverse pinion if worn and new Oilite brushes where required. Check leadscrew, half nut and replace where necessary. Refit half nuts and complete assembly. Refit apron to lathe, check and adjust rack pinion for meshing with rack.
Super 7 Powerfeed
Fit new rack pinion, hand traverse pinion and Oilite bushes as required. Check leadscrew, half nut and replace as necessary. Refit half nuts and check for closing balance on jig. Refit apron to lathe, check and adjust rack pinion for meshing with rack.
254S and Plus
Fit new rack pinion, hand traverse pinion and Oilite bushes as required. Check leadscrew half nut and replace as necessary. Refit apron to lathe. Check and adjust rack pinion for meshing with rack.
Ml10, Speed 10 and Diamond 10
Fit new hand traverse pinion and counter pinion as required. Check leadscrew half nuts and replace as necessary. Refit half nuts and complete assembly. Refit apron to lathe.
Gearboxes and change wheels
Engage the tumbler reverse lever and check that the drive train to the leadscrew functions properly. If the lathe is fitted with a quick change gearbox run this through the 8 speed selections on the front of the gearbox to ensure that neither the tumbler selector gear nor the gears on the cone or layshaft are damaged, these can be complex to replace. Remember you must stop the lathe before moving the selector lever. Check that the selector lever on top of the gearbox also functions correctly. (This can be done with the gearbox running.)
Procedures used in factory rebuild
Super 7 and ML7 changewheel
Check and refit leadscrew, checking bushes in right hand and left hand brackets, set engagement of half nuts. Refit changewheel guard and drive train from headstock spindle to leadscrew fitting standard set of changewheels.
Super 7B and ML7B gearboxes
Remove Quick Change Gearbox lid and flush out. Refit gearbox to lathe. Check and refit leadscrew checking bushes in the right hand bracket and setting engagement of half nuts. Refit gearbox guard, backplate and drive train to spindle.
254S and Plus, gearboxes
Flush gearbox, check for any obvious wear or damage and rectify as necessary. Refit gearbox to lathe. Check and refit leadscrew setting half nut engagement and checking bushes in right hand bracket. Refit drive guard and backplate and drive train to spindle.
ML10, Speed 10 and Diamond 10 changewheel
Check and refit leadscrew, setting engagement of half nuts. Refit changewheel guard and drive train from headstock spindle to leadscrew fitting standard set of changewheels.
Tailstock barrel
On the ML10, Speed 10, Diamond 10 and ML7 lathes check the condition of the running fit between the tailstock handwheel and barrel. If there is a lot of play, new parts will be required. Extend the tailstock barrel as far as is practical and check for movement, (see Photo). Excessive play means that the front of the barrel bore in the body has worn ‘bell mouthed’ and will ultimately mean that a complete new tailstock will be required.
Procedures used in factory rebuild of tailstock
Super 7, 254S and Plus
Check front of bore for bell mouthing, fit new tailstock body if required. Check barrel, feedscrew and nut for excessive wear and replace as required. Replace barrel key and refit barrel etc. Replace tailstock body set over screws if damaged, refit tailstock base and refit tailstock to lathe setting clamping lever and base gib strip. Check and adjust tailstock alignments relating to headstock. Check tailstock barrel height relative to headstock spindle and fit a new tailstock base as a corrective measure if required.
ML7, ML10, Speed 10 and Diamond 10
Check front of bore for bell mouthing, fit new tailstock body if required. Check barrel, keep plate, and handwheel for excessive wear and replace as required. Replace barrel key, refit barrel etc. Replace tailstock, refit tailstock to lathe, resetting clamping lever and base gib strip. Check and adjust tailstock alignments and alignment relative to the headstock. Check tailstock height relative to the headstock spindle and fit a new tailstock base as a corrective measure if required.
The chuck
Check that the jaws are parallel and not ‘bell mouthed’ and that there is no sign of abuse; is the chuck key present? Is it smooth in operation and are the internal threads in good condition? Hold something that is known to be round in it and rotate the spindle by hand, using the DTI to check that it’s concentric. A good chuck should read no more than 0.003in. (0.76mm) three inches from the jaws and less at the jaws.
Also be aware there are currently no spares available for British made Pratt Burnerd chucks, if the chuck shows serious signs of wear it is best avoided.
Motor
For use in a private workshop, use single-phase electrics so that the motor can run on domestic 240V supply via a three-pin plug. Also check that the motor is the correct size for the lathe and runs at the correct speed. Disengage the motor to countershaft drive belt, or in the case of the 254 lathe, the drive belt. Run the motor on its own and check for noisy uneven running. Myford has only ever recommended resilient mounted motors as the mountings tend to smooth out inherent single phase vibration.
Procedures used in factory rebuild for motorizing
Super 7
Re-assemble motorizing unit. Refit countershaft arm and motor platform. Check bearings in outboard pulley, check condition of push rod, push bar, thrust race and camshaft, replace as required. Re-assemble, reconnecting new headstock V-belt and realign pulleys. Re-adjust clutch for correct clearance.
ML7
Re-assemble motorizing unit. Refit countershaft arm and motor platform. Check countershaft and bushes for excessive wear and replace if required. Re-assemble, reconnecting new headstock V-belt and realign pulleys.
254S and Plus
Re-assemble motor platform. Refit motor and pulley. Realign pulleys. Fit new drive belts.
ML10, Speed 10 And Diamond 10
Re-assemble motorizing unit. Check countershaft and bushes for excessive wear and replace if required. The lathe is fitted with one piece left hand raising block that carries countershaft arm, refit motorizing unit.
Electrics
Check the general condition of the wiring and the switch gear. Many older lathes were fitted with Dewhurst & Partners drum type switches and/or M.E.M. push button starters. The drum type switch can be problematic with contacts arcing, spares for both are no longer available. If you are looking at a machine on an older industrial stand with an inbuilt electrical panel, beware as most of these left the factory suitable for 3-phase supplies. Conversions are often bodged and the correct replacement parts are not easy to come by.
Procedures used in factory rebuild for electrics
All lathes except 254
Test and either refit or replace motor. If current style reversing push button starter originally fitted tests correctly, refit. If alternative type of switch fitted, i.e. drum type reversing, Krause & Naimer rotary switch, M.E.M. push button starter etc. remove and replace with current switch fitting. If Mk 1 or Mk 2 style industrial stand renew and overhaul existing built in control panel.
254S and Plus
Overhaul and where necessary renew existing electrical equipment.
Paintwork
A good quality lathe will have a good quality finish, it protects and assists in keeping the machine clean and free of oily deposits. Every Myford rebuild is insspected and surface finishes are reinstated where practical.
Serial number search
Before you buy a pre-owned Myford lathe take the serial number and ask Myford about its history. If it has been returned to our works at any time we will have a record, we will also be able to tell you its age and to whom the lathe was supplied when new. Knowing as much as possible about the lathe you are thinking of buying can make owning a Myford a more rewarding experience.
Email [email protected] and they will happily answer any questions.
A word about Myford Factory Rebuilds
Pre-owned Myford lathes are purchased by the company specifically for rebuilding. The production schedules allow for a small quantity to pass through the works alongside building of new machines. The process takes about three weeks from start to finish, they then go through the same inspection tests as the new machines. After which they are certificated, plated and guaranteed exactly as the new machines.
Myford sells Factory Rebuilt Lathes all over the world, they are identified from its records and, more recently, by the addition of the plate above that carries the date on which that particular lathe left the factory for the second time.
When a rebuild is carried out by Myford it will be guaranteed to meet the same specification it was originally built to, this means the new owner will have the Myford standard of reliability and accuracy. You will also have access to spares, tools and accessories as well as support offered on new machines.
Image: Shutterstock/AlxAustralia
Updated Jul 12th 2018, 8:41 PM
IRISH WATER HAS warned that water restrictions in the Greater Dublin Area are “likely to begin early next week”.
The water utility said night time water restrictions may be needed to avoid widespread outages in the autumn and that a final decision is expected tomorrow.
A national hosepipe ban remains in place and Irish Water says there are already over 20 schemes across the country on restrictions.
A spokesperson for Irish Water told TheJournal.ie that, “The times have yet to be determined but the initial restriction could be midnight to 5am but that is still to be confirmed.”
In a statement released this afternoon, the utility said: “Irish Water and the local authorities are working through over 800 district meter areas to establish where water supplies can be restricted and for how long while minimizing the impact to homes and businesses.”
Irish Water Engineer and Corporate Affairs Manager, Kate Gannon said, “Introducing restrictions was an option that Irish Water hoped could be avoided because of the inevitable impact on homes and businesses.
We are monitoring the situation, but the weather is not changing, the rain is not coming. Something else has to be done to protect water supply and avoid widespread outages in the autumn.
“A final decision will be taken tomorrow when more detail will be issued regarding the timings and the affected areas.”
Speaking in the Dáil this afternoon, Minister for Housing, Planning and Local Government Eoghan Murphy said there is an urgent need for water conservation.
He said the overriding concern would be for the future availability of drinking water.
The crisis is not over, it’s far from over, although there will be rain this weekend it won’t be anywhere close to what we need.
He said we need three weeks of rain to restore cuurent supplies.
He added that if we don’t see enough rain by August, daytime water restrictions could need to be put in place.
It’s not just for July and August we need to plan but for September and October also.
However he added that water consumption has stabilised and he thanked the public for their cooperation.