The Workshop

 The first 9-inch Workshop was the 1934 No 5.

 No. 5 Notes:

• Has an oil hole in the half nut lever, later model Workshops had the hole above the lever in the apron casting.
• Has a noticeably thinner saddle.
• The saddle lock is on the right rear wing and locked the saddle gib.
• Has a thicker compound base with short "duck bill" casting at the rear.
• Has a shorter compound swivel.
• The compound rest top and base has 5 10-32 gib screws.
• The compound base has a single swivel boss locking screw on the right side.
• The compound feed screw mount bushing is a smaller hex nut style.
• Has smaller micrometer dials.
• The cross feed mount bushing is shorter that the later workshops.
• The cross-feed nut was cast-iron and a little longer (0.960) than later Workshops, with a smaller diameter (0.625) mounting boss.
• The headstock is a top oiling style.
• The spindle threads are 1-3/8-10 and the spindle length (11-13/16) is shorter than the later Workshops, has 3/4 through hole.
• The Change Gears were 20 DP.
• The compound gear is 20/100 or 5:1
• The No. 5 did not have a reverse shifter like the later Workshops; it used a removable 32 tooth reverse gear in the train.
• The lead screw, at the point where the gear fitted to its end, had a diameter of 0.625.
• The lead screws on the No 5’s were Acme left-hand instead of right-hand pitch.
• The tailstock has an open web allowing access from either side.
• The special studs that hold the half nuts on a 405 and on the prototype 415 are longer. These original studs or special bolts are about 1/4 inch longer than standard workshop models.
• The apron casting is just a little thicker in the half nut area on a 405 lathe.
• A plain, non-adjustable bench-mounted countershaft for the HMD 405 models was used for the bench drives.
• The No 5 Workshop does not use the capillary spring loaded oilier, it has a felt wick in the keyway at the top of the bearing journal under the oil cup.

 The first 125 Workshop No. 5 lathes manufactured, used a new bed casting(B5), which was a slightly changed Toolmaker B4 bed.

 View Workshop No. 5 Catalogs with lathe specs and feature descriptions:

pdf: 4/12/1934, Intro flyer hand-out, No. 5 Workshop

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