====== Metal Lathe - Harrison M250 ======

{{:equipment:metalshop:metallathe.jpg?600|}}
 
<callout title="Induction Required" type="danger" icon="true"> This equipment requires an induction prior to use. For your own safety and to avoid damage to the equipment do not attempt to use it until you have been inducted. </callout>
<callout title="Crush / Laceration / Entanglement" type="warning" icon="true"> This equipment is hazardous to the user or those around them, take care during use.</callout>
<callout title="PPE Required" type="primary" icon="true"> This equipment requires the use of eye protection during use. </callout>

=====Introduction=====
The Harrison M250 lathe (also sold as Colchester Bantam with a different gear change and control lever layout) was designed to appeal to schools, training establishments, repair shops and those needing a strong, properly-built but compact lathe for light production work.


The M250 is a full-function machine capable of the entire range of turning operations, and through the available range of
accessories its scope and versatility can be increased even further. Quality, reliability and response make it one of the most
outstanding lathes of its kind especially in industry, the toolroom, training and secondary and tertiary education.


  *Easy to understand headstock mounted speed, threading and feed charts\\
  *Smooth power transmission through a twin vee belt drive and induction hardened and ground headstock gearing\\
  *Large saddle and slide bearing areas for precision and long life\\
  *Deep section top slide with dovetail guides and gib strip adjustment\\
  *The combination box section cast iron bed and rigid steel base provides an incredibly strong structure\\
  *A huge selection of accessories are available\\

[[http://www.lathes.co.uk/harrison-m/|Detailed review and discussion of Harrison M series lathes.]]

===== Induction to use the Lathe =====
To request an induction please post on the forum. The induction takes about 1.5 hours.\\

**Pre-Induction Study:**

If you are new to lathe work, please prepare for the induction by watching the first 5 videos of [[https://www.youtube.com/watch?v=H6Dnmd3lDzA&list=PLY67-4BrEae9Ad91LPRIhcLJM9fO-HJyN|BlondieHacks Lathe Skills on youtube]] (apx 35 minutes). We highly recommend the whole series.

{{ :equipment:metalshop:harrison_m250_-_metal_lathe_induction.pdf |Link to induction notes.}} 

===== Safety Risk Assessment =====
[[https://docs.google.com/document/d/1z51KInG7yeiGM2_yVj6Y4i3NOqmrALD8/edit?usp=sharing&ouid=117184830174901200101&rtpof=true&sd=true|Link to the risk assessment.]]
 
===== Specification ===== 
  *290mm Swing Over Bed\\
  *180mm Swing Over Cross Slide\\
  *525mm Between Centres\\
  *35mm Spindle Bore\\
  *No. 3 D1 Camlock nose\\
  *40-2000rpm Spindle Speeds\\
  *1.3kW Motor\\
  *Quick change gear head\\
  *Quick change tool post\\
  *Metric and imperial thread cutting\\
  *Power feed on main carriage and cross slide\\
 
===== User Manual =====
{{ :equipment:metalshop:metallathe:harrison_m250_machine_manual_enhanced.pdf |PDF of Harrison M250 Manual}}

===== Accessories =====
[[equipment:metalshop:metallathe:accessories|]]

===== Suitable Materials ===== 
The Metal Lathe is very happy cutting most common engineering materials. including:
  * Ferrous metals: Steel, cast iron and stainless steel 
  * Non-Ferrous metals: Brass and Aluminium.
  * Engineering plastics: Such as Nylon, Delrin, Acetyl are also perfect.

On very rare occasions, when there is a case for using metal lathe to cut hard wood precisely. If this is the case, please take care clean off all traces of wood dust when you have finished. After clean up, anoint the lathe with copious amounts of ways oil, repent for your sins and consider sacrificing a small mammal to the metal gods. 

If you have any doubts as to whether a material is suitable, or whether it needs HSS or Carbide Tooling and coolant, please ask on the forum.

===== How to guides =====

How to use the Tap Follower

How to use the Die Holder

[[equipment:metalshop:metallathe:tdi|How to fit the Thread Cutting Gauge.]]\\

[[equipment:metalshop:metallathe:howto:cutthreadsl2r|How to cut Threads using the Left to Right Method.]]
===== Maintenance =====
Daily maintenance is to be carried out every time you use the lathe.
A some documents and links on how to do things on the lathe.
[[equipment:metalshop:metallathe:metallathemaintainance|]]

===== Problems and Current To Do list ===== 
See [[https://bristolhackspace.discourse.group/t/metal-lathe-team-assemble/653|the forum thread for the Metal Lathe Team.]]

In the event of anything urgent please post on the forum or contact Drew or someone from the committee. \\
In the event of the lathe being unsafe to use, please add a note clearly marking it to warn other members and explain why and alert on the forum or contact the committee on <committee@bristol.hackspace.org.uk>\\

===== List of Authorised Inductors and Inducted Members  =====
Here is the [[equipment:metalshop:metallathe:inducted|list of currently authorised inductors and inducted members.]]