Lathe, metal (Challenger 1660G) ID:46

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46.jpg
Type Metal lathe
Make/Model Challenger 1660G (aka Birmingham LUX 1660G or YCL-1660)
Serial number ??
Original owner Protospace
Loan status Owned by Protospace
Arrival date 2015-12-22
Location Metal shop
Functional status Working
Usage permissions Open to full members
Certification Metal Cutting & Manual Lathe
Wiki-ID 46
Label 1.0" 1.5" 2.0"

Specifications

All from the 1640T/1660T page listed in the Documents section unless noted.

  • Dimensions: 29" deep × 72" long × ?? tall (according to John W)
  • Mass: ~4000–5000 lbs
  • Motor: 7.5 hp, 3-phase, 220 V
  • 36–1800 RPM spindle speed in 12 steps
  • Capacities
    • Swing over bed: 16"
    • Swing over cross slide: 10"
    • Distance between centers: 60"
    • Swing in gap: 60"
    • Width of bed: 24"
  • Headstock
    • Spindle nose: ASA D1-6
    • Spindle bore: 2 1/16" or 2 1/8"
    • Spindle taper: MT 6
    • Spindle speeds: 36, 60, 82, 93, 158, 215, 302, 510, 695, 786, 1328, 1800 rpm
  • Threads & feeds
    • Imperial threading: 2–72 TPI (45 kinds)
    • Metric threading: 0.2–14mm (40 kinds)
    • Module pitch threading: 0.3–3.5 M.P. (18 kinds) (for making shafts for worm gears)
    • DP threading: 8–44 DP (21 kinds)
    • Longitudinal feed range: 0.002"–0.04" ipr
    • Cross feed range: 0.001"–0.02" ipr
  • Carriage
    • Cross slide travel: 8 1/4"
    • Compound slide travel: 5 1/4"
  • Tailstock
    • Center taper: MT 4
    • Quill travel: 6 1/4"
    • Quill diameter: 2 1/16"
  • Coolant pump
  • Safety foot brake


Jank

Carriage Lock

If the carriage doesn't freely/easily move in the X direction, there's a fat hex bolt head sticking up on the right side of it that needs loosening.

(add pic here)

Power Feed

Note that while generally gears/speeds shouldn't be changed while the lathe is in motion, from https://forum.protospace.ca/t/can-t-get-lathe-power-feed-to-work/3568/8

Set it to a lowish speed like 400 or less and bump the jog button. Then start wiggling leavers while it’s coasting down and watch the drive shaft and screw. You’ll feel it when it engages and the shafts will start spinning…

The threading lead screw and the power feed drive shaft are taken off at different points in the gear train. It is possible to jiggle a leaver and get one to start spinning while the other is still not engaged properly and requires further jiggling.

The XYWZ lever is the worst and usually requires persuasion to engage. The gears are all straight cut, and all may require sufficient wigglage before they cooperate. And the number dial is keep turning until it works. It’s about 1/4 past the number you want.


Documents

Reference

Training

(training material linked here?)

Practical Project

(tired of digging this out of drive, insert here?)

Tooling

Short Description Shank Size Typical Insert Types Long Description Photo Manuf Code ANSI ISO Replacement Screw Type Manufacturer New Price Condition Notes
Grooving Insert Holder 3/8 " GIE-7 Right Hand, 4.5" long, grooving, parting and turning tool THE-7-3 8-R.jpg THE-7-3/8-R Nicole $110.7 Good
Boring Bar 3/4 " CCMT33x, CCxT33x Boring bar, RH, 7" (174 mm) long BoringBar174 small.jpg Poor Damage reduces insert support. Missing insert screw.
Boring Bar 3/4 " CCMT33x, CCxT33x Boring bar, RH, 5 3/4" (144 mm) long BoringBar144 small.jpg Poor Damage reduces insert support. Missing insert screw.
Boring Bar 3/4 " CCMT33x, CCxT33x Boring bar, RH, 4 7/8" (121 mm) long BoringBar121.jpg Serviceable Missing insert screw.
Boring Bar 1" CCMT33x, CCxT33x Boring bar, RH, 8" long SER 1000 M16.jpg Fair Missing insert screw.
Threading Insert Holder 1" Full form or partial form. See notes. Threading insert holder IscarThreadingInsertHolder.jpg SER 1000 M16 Iscar US$158.62 Fair Scuffing. See manufactures documentation for insert selection.

Image shows regular turning insert, not threading insert.

Triangular RH, G Insert Holder 3/4" TNMG43x, TNxG43x Triangular RH, ANSI G Type MTJNRS 46- 4 D.jpg MTJNRS 46- 4 D Valenite Serviceable ANSI shank numbers are flipped. Damaged shank. Shank has been machined.
Triangular RH, J Insert Holder 3/8" TNMG32x, TNxG32x Triangular RH, ANSI J Type TBR12 3 8 IC.jpg TBR12 3/8 I.C. Carboloy Fair
Parting Tool Holder 3/4" HSS HSS parting tool holder. Quick change for 3/4" tool post. PartingToolHolder small.jpg Good

History

This lathe was bought by Protospace using funding approved for the purchase of new machine tools at the December 2015 members' meeting. It was picked up and brought to Protospace on 2015-12-22 along with the ACRA mill and the new 80-gallon air compressor. It replaces Kyle Paavola's lathe; it has equivalent capability. It came with the following accessories:

  • 3-jaw chuck
  • 4-jaw chuck
  • Big steady rest
  • Taper attachment
  • 40-position tool post and one tool holder with a carbide tool holder in it
  • Live center
  • A carriage stop with a micrometer
  • Coolant pump