Another special feature of horizontal CNC milling machines is that they have thicker and shorter cutting tools. This allows them to make heavier and deeper cuts.

Lower RPM will give smaller hole, higher RPM will cut bigger as a general trend. I would run that part at 250 RPM and 8 IPM and liberal cutting oil....(reamers have more cutting edges than a drill)

I am old school too, I would use 200 rpm % 2.500imp..... old timers always said you should be able to see the flutes while it's turning.

If you are looking to hold a finish, you might slow feed down a little and make sure your reamer is indicated in to hold size. If you just need to hold size, feed as fast as possible.

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HSS reamerspeeds and feedsmetric

We also consider an advantage of horizontal CNC milling machines its solid construction. Why? Because in general they can handle larger and heavier workpieces. In addition, the rigid construction makes the machine vibrate less, bend less and run smoother than vertical milling machines.

Carbide reamerspeeds and feedsMetric

Tool is HSS and work piece material is some kind Mild Steel.Its not too hard. Drilling was pretty easy using HSS drill bit Its a table to be used for a welding robot.

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Likewise, the rule applies to feed as well. Slow the feed down some, hole is bigger. Kick the feedrate up, hole is smaller.

HSS reamerspeeds and feedsaluminum

In short, horizontal milling machines are generally a better choice for complex projects. A clear example is the frequent use of this type of machine in the creation of medical tooling. Indeed, CNC horizontal milling machines produce complex parts for the medical community, from scalpels to advanced diagnostic imaging equipment.

I'm with Merlin and Tom on this one.... I start at 800-1000rpm and 10-15 IPM feed with coolant. Hell, I start at that with SS.

The reason for faster reaming feeds is so that the top of the hole won't bell mouth if you have a little runnout, the reamer will follow the hole.

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Reamerspeeds and feedscalculator

Horizontal milling machines don’t use a fixed spindle, as vertical milling equipment does. Rather they use cutting heads like small circular saws mounted on a horizontal arbor. And that’s where the real advantage of horizontal milling machines lies; in the spindle-mounted cutters, called side and face mills, which have a cross-section rather like a circular saw but are generally wider and smaller in diameter.

HSS reamerfeeds and speeds

Milling is a very common machining process in machine shops. It involves the use of a machine, known as a milling machine, to remove material from a workpiece using a rotating cutting tool. In milling, the workpiece remains stationary while the cutting tool rotates. When the rotating cutting tool presses against the workpiece, it removes the material.

But what is a horizontal milling machine used for? They are mainly used for the following types of machining operations:

Carbide reamerspeeds and feeds

I have to Ream a piece of steel table on a CNC HAAS machine. What would be the ideal speeds and feeds for Reaming a 5/16 hole 1.2 inch deep.

Horizontal milling machines differ from their vertical counterparts in several ways. The most significant difference between these two types of milling machines is the orientation of the spindle. With vertical milling machines, the spindle features a vertical orientation. With horizontal milling machines, the spindle features a horizontal orientation. In other words, horizontal milling machines mount the cutting tool on a horizontally oriented spindle that’s able to selectively remove material from the stationary workpiece.

Reamer RPM chart

I'd go slower on reaming than on drilling since its finishing and you don't want to generate much heat. But then again you're taking off so little that might make up for it.

HSS reamerspeeds and feedschart

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I used 1000 rpm for drilling. Should I go faster than 1000 rpm since Reaming is a finishing operation? Also what about the feed, I used 5 inch per min feed for drilling.

I'd start at 600rpm / 5ipm to start with for a 4-flute reamer, cooled, and work upwards from there. Better to start slow and work up than to start fast and scrap parts.

If all else fails, and the hole is still small (and you don't have or can get a bigger reamer), then 'tickle' the reamer.

Both horizontal and vertical CNC milling cutters have their advantages, and the choice between them depends on the type of milling to be performed. But as we mentioned before, in this post we will focus on horizontal ones.

Once we understand this first step, we can move on to the different types of milling machines with their unique characteristics. In this post we will go deeper into the horizontal type. We will talk about its particularities and what it is used for, don’t miss it!