M618 Surface Grinding Machine
The M618S is a manual bench-class surface grinder built around castings rather than fabrications. The body is high strength cast iron that has been annealed and seasoned, so the internal stresses are out of the iron before the machine is machined and it does not move in service. The worktable is steel and runs on high ...
What This Machine Does
The M618S is a manual bench-class surface grinder built around castings rather than fabrications. The body is high strength cast iron that has been annealed and seasoned, so the internal stresses are out of the iron before the machine is machined and it does not move in service. The worktable is steel and runs on high precision steel balls, which is why it is light to move by hand and stays wear resistant under daily use; the manual table is driven by a synchronous belt, so the feel stays consistent rather than varying with backlash. The spindle uses ultra precision P4 ball bearings, measured and pre-loaded to a strict figure and assembled in a greenhouse so the preload is set at a known temperature, with a fully waterproof labyrinth seal design to keep coolant out. That seal is what protects the bearings and holds surface roughness over the life of the machine. The spindle motor runs without vibration at low noise, and the vertical feed is on ball screw. Digital display, electric automatic feed and a transformer can be fitted to suit the customer.
Why Buyers Choose This Machine
- High strength cast iron body annealed and seasoned so the machine does not move after it leaves the factory
- Ultra precision P4 spindle bearings measured and pre-loaded then assembled in a greenhouse at a controlled temperature
- Fully waterproof labyrinth seal keeps coolant out of the spindle bearings which is what protects surface roughness over time
- Steel worktable on high precision steel balls stays light to move and wear resistant under daily use
- Synchronous belt drive on the manual table gives consistent feel without backlash
- Ball screw vertical feed so small downfeed increments actually reach the wheel
- Digital display electric automatic feed and transformer available as fitted options
Where M618 Surface Grinding Machine Earns Its Place
Problems It Solves
- An unseasoned casting moves after machining and the accuracy goes with it
- Coolant working past the spindle seals kills bearings and the surface finish degrades
- Spindle bearings pre-loaded at the wrong temperature run tight or slack in service
- Backlash in a manual table drive makes the finishing pass unpredictable
- Vibration from the spindle motor shows up directly as chatter in the ground face
- Buying a fixed specification machine when the shop actually needs a digital display or auto feed
Who It Is For
- Toolrooms and die shops working on small precision parts
- Maintenance workshops grinding replacement components
- Training and research workshops needing a manual precision grinder
- Machine shops adding a bench-class grinder alongside larger machines
- Distributors supplying manual surface grinders to small workshops
Application Scenarios
- Toolroom flat grinding of punches dies and gauges
- Finishing hardened small components after heat treatment
- Grinding fixture and jig bases flat and parallel
- Maintenance shop work restoring worn flat faces on small parts
- Precision grinding in a workshop where coolant is used heavily
- Small batch grinding where the operator wants manual table control
Technical Detail
Technical Features
- High strength cast iron castings, annealed and seasoned
- Steel worktable running on high precision steel balls
- Synchronous belt drive on the manual worktable
- Ultra precision P4 ball bearing spindle with measured strict preload
- Spindle assembled in a greenhouse under controlled conditions
- Fully waterproof labyrinth seal design on the spindle
- Ball screw feed
- Low noise spindle motor without vibration
- Optional digital display electric automatic feed and transformer
Specifications
| Machine type | Manual surface grinding machine |
|---|---|
| Models | M618 / M618S |
| Machine castings | High strength cast iron, annealed and seasoned |
| Worktable | Steel with high precision steel balls |
| Table drive | Synchronous belt, manual |
| Spindle bearings | Ultra precision P4 ball bearings with measured preload |
| Spindle sealing | Fully waterproof labyrinth design |
| Feed | Ball screw |
| Options | Digital display, electric automatic feed, transformer |
Figures above are taken from the product information we hold. Send us your application and we will confirm the exact specification for the model quoted.
How It Is Built and What Can Be Changed
Operations Performed
- Surface grinding
- Flat face grinding
- Parallel face grinding
Materials Handled
- Cast iron
Quality Control
- Castings annealed and seasoned before machining so stress is relieved ahead of final accuracy work
- Spindle bearing preload measured to a strict figure before assembly
- Spindle assembled in a greenhouse so preload is set at a controlled temperature
- Labyrinth seal checked for waterproof integrity before the machine is released
- Spindle noise and vibration checked and a test grind run for surface roughness before packing
Customisation Options
- Digital display fitted where the shop wants position readout
- Electric automatic feed fitted in place of manual table movement
- Transformer supplied where local voltage requires it
- Supply voltage phase and frequency built for your market
- Magnetic chuck and grinding wheel specification chosen for your parts
How It Compares With the Alternatives
| M1230 surface grinder | The M1230 takes parts to 630mm and runs hydraulic transmission; the M618S is the smaller manual machine built around a P4 spindle and a sealed bearing housing |
|---|---|
| M7120 to M7140 series | Those are hydraulic feed machines for a general workshop; the M618S is the bench-class precision grinder for small toolroom parts |
| Fabricated steel machine bodies | Annealed and seasoned cast iron has the stress taken out of it before machining, so the machine does not distort over the first year in service |
| Buying the base model and adding a readout later | Digital display electric automatic feed and transformer are fitted at build, which avoids a retrofit that never sits as well as the factory installation |
Running the Machine
Step 1
Clean the chuck face and seat the workpiece with nothing trapped underneath
Step 2
Let the spindle run up and settle before taking a finishing cut
Step 3
Dress the wheel before starting the component
Step 4
Move the table by hand at an even rate so the synchronous belt drive keeps the feel consistent
Step 5
Take light downfeed increments on the ball screw with coolant on the contact
Step 6
Spark out on the last pass and measure the part off the machine
Step 7
Keep the labyrinth seal area clean and check it as part of routine maintenance
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Questions About M618 Surface Grinding Machine
What size parts does it handle?
It is a bench-class manual grinder. Send us the dimensions of the parts you grind and we will confirm the working capacity of the M618 configuration that suits you.
Can we have a digital readout?
Yes. Digital display, electric automatic feed and a transformer can all be installed according to your requirement. Tell us which you want when you enquire and they are fitted at build.
Why does the spindle assembly matter?
The spindle uses ultra precision P4 ball bearings with a measured strict preload, assembled in a greenhouse so the preload is set at a controlled temperature, and sealed with a fully waterproof labyrinth design. That combination is what keeps bearing life and surface roughness where they should be.
Is the table movement manual?
Yes as standard, driven by synchronous belt on high precision steel balls. Electric automatic feed can be fitted instead if you prefer.
What surface roughness will we achieve?
That depends on the wheel, the material and the coolant. Send us your part drawing with the roughness you need and we will tell you whether the machine meets it before you order.
Can it be built for our voltage?
Yes, and a transformer can be supplied where your local supply requires one. Confirm your voltage phase and frequency at enquiry.
What are your payment and trade terms?
FOB CFR and CIF. Payment is 30 percent by T/T on order and 70 percent before shipment, or an irrevocable L/C at sight.
Request a Quote on the M618 Surface Grinding Machine
Send us the work you need it to do, the voltage on your site and the port you ship to. We will come back with the model, the tooling and the lead time.