Lathe, metal (Challenger 1660G) ID:46

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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

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

• Sales page for 1640T and 1660T models
• According to those in the know (Danny P and John W) there are three manuals for this machine:
• 1640G/1660G Instruction Manual and Parts List
• 1640T/1660T Instruction Manual and Parts List
• 1500/1600 Instruction Manual and Parts List

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				Nicole	$110.7	Good
Boring Bar	3/4 "	CCMT33x, CCxT33x	Boring bar, RH, 7" (174 mm) long								Poor	Damage reduces insert support. Missing insert screw.
Boring Bar	3/4 "	CCMT33x, CCxT33x	Boring bar, RH, 5 3/4" (144 mm) long								Poor	Damage reduces insert support. Missing insert screw.
Boring Bar	3/4 "	CCMT33x, CCxT33x	Boring bar, RH, 4 7/8" (121 mm) long								Serviceable	Missing insert screw.
Boring Bar	1"	CCMT33x, CCxT33x	Boring bar, RH, 8" long								Fair	Missing insert screw.
Threading Insert Holder	1"	Full form or partial form. See notes.	Threading insert holder		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			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 I.C.			Carboloy		Fair
Parting Tool Holder	3/4"	HSS	HSS parting tool holder. Quick change for 3/4" tool post.								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