Description
| Max. grinding length | 500 mm |
|---|---|
| Grinding diameter | 500 mm |
| Inter | Yes |
| Max. swing diameter | 800 mm |
| Spindle motor power | 4 kW |
| Worked hours | 20 hours |
| Hours under power | 30 hours |
| State | rebuilt |
METRIC Heald (Cincinnati) 273A fully rebulit machine with highest care by grinding machine specialist (1350 assembly & painting hours). We have complete photographic album as machine dismantled and rebulit to last screw. Any part or assembly can be checked, machine throughly tested under power.
All nature elements are blacked, zinc or chrome plated (except ground or craped castins). Painted parts are sand blasted then either powder painted or painted with German top brand oilproof 2K paint in lovely cement gray colour, 7033.
The machine has solid hidrostatic sliding bearing in the bed on Z and X direction, therefore the sliding elements has almost zero friction and wear. Will be serving for many years to come.
Bedways are ground on Waldrich high precision bedway grinder the oppsite part is matched with ultra high precision, special hand scraping to 0,002mm straightness per travel.
The cross feed is equipped with a high precision thread ground shaft and individually fitted bronze nut, plus hydraulic back slash compensation to eliminate any play.
Centre height is lifted by factory, so 800mm swing is achievable, instead of the original 500mm. Large 908 TIMKEN taper roller barings, 2.2Kw work spindle and 4Kw grinding spindle motors serve the higher power requitements.
Mechanically the machine is rebuilt to the original state, but electric unit is completly replaced with new, very easy to control design and CE parts except hydraulic and grindig motors. The two main motors driven by 4Kw frequency inverters. Continously adjustable from 0-normal maximum-double speed where motor is capable duble RPM (0-50-100Hz). This speed is approximately 0-500RPM of the work spindle and 0-2980 on the main motor further increased speed by belt drive to the required grinding spindle speed.
Swing: normal: 500m (this machine: 800mm)
Depth of grinding: 500mm
X travel on fine feed: 40mm approx.
OD of grinding spindle for medium bore grinding: 3.75″ or spindle housing reborable to 100mm (prepared for). For face grinding there is an offset large capacity, offset assembled grinding spindle as an option.
Parallelism of ways: maximum deviation is nominal 0,005mm/travel (approx 0,003 measured).
Weight of machine: 4 tonns approximately
Dimensions shown on photo attached (this photo is for basic machine)
Accessories:
315mm chuck, and 800mm face plate.
Guards (Comple enclosure with plexi shield)
Wheel dresser (quick use type, our own design and built)
Hydraulics
Cooling oil tank and pump (a large one, not he one shown on the photo, equipped with big pump and iron wheels for easy move)
Complete issue of operation manual for basic machine, spare parts catalogue and drawings of original electrics, all in English language.
The machine is complete and ready to use.
Transportation cost is to be agreed in advance, and exact price will depend on buyer’s shipping destination, and packing requirements. We can provide good rates. Loading is free for flatbed lorry, but unloading is responsibility of the buyer. We can ship machine via coper in 20″ container on wooden skid worlwide. Please inquire cost before purchase.
If you are VAT validly registered in the EU, you will be able to buy VAT free. Outside eu exports are also 0% VAT rated.
Preferred payment method is bank transfer.
Please contact us to finalize the contract of sale and make arrangements BEFORE buying, checking out or making any payment.
