This cut represents our Portable Upper Runner Mill. The heavy runner in addition to being built in balance is provided with five improved standing and running balance weights, adjustable with screws. (See under head of “Standing and Running Balance.”) This mill has the self-tramming irons set forth under its proper head; improved silent feed rig; wrought iron spindle with steel ends; steel cock-eye in runner stone; a tram step to tram by means of screws; the oil fountain bush and followers; pine stave curb or hoop banded with iron under walnut finish; stones faced and furrowed, of a good selection of French burr, of sharp even quality, and other additions and advantages not necessary to mention, all made complete with pulley as shown in the cut, or gear as shown on page 16, and secured in a strong ash husk frame. The step-irons used in this mill admit of our using a much longer spindle without making top of mill higher than usual. The principal improvements on this mill have been secured to us by two distinct Letters-Patent.
| Diameter of Stones. | Diameter of Pulley. | Width of belt to drive. | Revolutions per minute. |
| 30 inch. | 20 inch. | 8 inch. | 360 |
| 36 inch. | 24 inch. | 8 inch. | 300 |
| 42 inch. | 30 inch. | 10 inch. | 240 |
ALL OUR PULLEY MILLS
Are furnished with our improved low down Set Screw Step, giving a spindle one-fifth longer than any other mill with same height of hopper, and constructed in the ordinary manner.
With this step the spindle is trammed by means of set screws, thus making it more readily and accurately adjustable, at the same time avoiding the liability of getting out of tram. This step is so constructed as to avoid changing from its true position or out of tram, when the runner stone is raised or lowered by the lighter screw. The husks of these mills are made of ash timber, strongly bolted together with wrought iron joint bolts. We furnish turned iron pulleys balanced and keyed to the spindle, so they can be raised or lowered at pleasure. The curbs around the runners are of the kind shown and described under head of “Mill Curbs or Hoops.” The feed rig, either our improved silent, or shoe and damsel, as may be wanted by the purchaser, or for the purpose required.
Attaching and Driving.
It will generally be found most desirable to drive our pulley mills from a horizontal shaft and pulleys, with reel belts and tightning pulleys in a movable frame, or quarter-twist belt.
Place the mill upon a solid floor or firm foundation with the bed-stone level; cleat around the posts, and bolt through two of the lower ties; if room is precious a platform can be placed over the belt or belts running from the line-shaft to the mill. This shaft should be from thirteen to fifteen feet from the mill spindle, to give sufficient length of belt.