equipment:9x20_metal_lathe [Lansing Makers Network Wiki]

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Status	Operational
Zone	Machine Shop
Owner	Tim Schmidt
Tool Type	Metal Lathe
Member Category	Full
User Manual	9x20_lathe_manual.pdf
Manufacturer	Central Machinery
Model	T45861
SOPs	Link
Checkout Required

9×20 Harbor Freight Lathe. This is a metric (by definition) lathe.

Swing Over Bed	9“
Swing Over Cross Slide	5-5/16”
Distance Between Centers	20“
Hole Through Spindle	25/32” (0.78125“)
Spindle Mount	1½ x 8 TPI
Spindle Taper With Sleeve	MT3
Number of Spindle Speeds	6
Range of Spindle Speeds	130 - 2,000 RPM
Number of Longitudinal Feeds	27
Range of Longitudinal Feeds	0.005 - 0.011”/rev
Number of Inch Threads	27
Range of Inch Threads	8 - 56 TPI
Number of Metric Threads	11
Range of Metric Threads	0.05 - 3 mm
Max Tool Size	½“ x ½”
Max Compound Slide Travel	1⅞“
Max Cross Slide Travel	5”
Max Carriage Travel	16“
Tailstock Spindle Travel	1-9/16”
Taper in Tailstock Spindle	MT2
Steady Rest Capacity	¼“ x 1⅞”
Follow Rest Capacity	¼“ x 1⅛”
Width of Bed	4½“
Main Motor	¾ HP, 1 Ph 115V only

In addition to the general shop safety rules, the following are important points to remember when operating this machine.

Wear short sleeve shirts, if possible, or shirts with snugly fitting cuffs if long sleeve. Loose sleeves can catch on rotating work and quickly pull your hand or arm into harm's way.
Remove wrist watches, necklaces, chains and other jewelry. It's a good idea even to remove your wedding ring since it can catch on rotating work and severely damage your ring finger and hand.
Tie back long hair so it can't get caught in the rotating work. Think about what happens to your face if your hair gets entangled.
Always double check to make sure your work is securely clamped in the chuck or between centers before starting the lathe. Start the lathe at low speed and increase the speed gradually.
Get in the habit of removing the chuck key immediately after use. Some users recommend never removing your hand from the chuck key when it is in the chuck. The chuck key can be a lethal projectile if the lathe is started with the chuck key in the chuck.
Keep your fingers clear of the rotating work and cutting tools. This sounds obvious, but I am often tempted to break away metal spirals as they form at the cutting tool.
Avoid reaching over the spinning chuck. For filing operations, hold the tang end of the file in your left hand so that your hand and arm are not above the spinning chuck.
Never use a file with a bare tang - the tang could be forced back into your wrist or palm. Inexpensive wooden handles are readily available for common file sizes.

Contact Carl Raymond or Brian Adams for training.