PCNC 770 CNC Mill
PCNC 770: The New Standard for Benchtop CNC Milling Machines
Tormach developed the PCNC 770 as an alternative to the expensive underpowered benchtop CNC mills typically encountered in R&D, Prototyping. Product Design, Education, Hobby CNC and other non-traditional machine shop environments. Our concept was to create a benchtop mill with power and rigidity to do real work, while still retaining all the important features that make a CNC benchtop milling machine attractive in the first place: small size, portability, and minimal input power.
Key Features: PCNC 770 Benchtop CNC Mill
- 10000RPM 1.0HP Dynamically Balanced Spindle
- 120 VAC 50/60 Hz Primary Power Requirement (standard line voltage in North America)
- 660 lbs with cast iron frame. (Machine weight, excludes stand and accessories)
- Unique Knock-down Design allows for installation in basement or other restricted spaces
- Suitable for Benchtop use / Optional Stand available
- Coolant-Ready / Optional Coolant Kit available
- Same Design Heritage as the PCNC 1100. Read our original PCNC whitepaper here.
Design Elements: PCNC 770 Benchtop CNC Mill
Iron and Frame Design
The PCNC 770 isn’t your ordinary benchtop CNC. Instead of extruded aluminum, it’s built with a stout cast- iron frame. Each PCNC 770 benchtop CNC mill employs over 650 lbs of cast iron and steel, precisely placed to provide maximum frame rigidity in a size that’s not much bigger than a traditional benchtop CNC. This makes the PCNC 770 a perfect choice as a benchtop milling machine.
Each PCNC 770 features hand-scraped cast iron hydrodynamic sliding dovetailed ways – still the best technology available for withstanding high loads and dampening machining vibrations. All PCNC 770 way surfaces are bonded with low-friction PTFE filled Acetyl co-polymer, then hand scraped by master machine builders. Similar to brand name compounds such as Turcite® or Rulon®, the PTFE filled Acetyl minimizes sliding chatter by virtually eliminating stick/slip friction while also providing superior wear resistance for a lifetime of use.
Each PCNC 770 milling machine employs hand-fitted tapered gibs. Tapered gibs provide superior accuracy and repeatability compared to the inferior plate and set screw design typically found on other CNC benchtop mills. Ways and gibs are serviced by a 15-point internal oil lubrication system.
Spindle System
The PCNC 770 features a robust 10000 RPM 1.0HP spindle powered by a simple, low–maintenance belt driven induction motor. Two belt ratios provide infinite speed control: 175 to 3,250 rpm in the low ratio, and 525 to 10,000 rpm in the high ratio, resulting in a spindle system that is both powerful and nimble at the same time – much more versatile than the underpowered spindles on typical benchtop CNC mill systems.
State-of-the-art sensorless vector technology from Emerson Control Techniques™ provides the PCNC 770 spindle motor with exceptional speed and torque characteristics unlike any other CNC benchtop mill.
Each spindle cartridge is dynamically balanced for smooth cutting performance at high speeds – necessary for engraving and light finishing with small diameter cutters
PCNC 770 mills feature an R8 spindle with a 3 3/8" nose diameter. This isn’t an arbitrary design, but the same standard as popularized by Bridgeport-style manual mills. This means the PCNC 770 can be used in combination with the innovative quick-change Tormach Tooling System® (TTS) or any readily available R8 tooling, expanding tooling choices beyond the limited or proprietary small collet systems of other benchtop CNCs.
Motion System
Direct-drive Motion is provided by precision ground P4 grade ball screws coupled to high performance polyphase stepper motors powered by microstepping driver technology from Leadshine® - the same system used on our industry leading PCNC 1100 mill for repeatable and accurate motion control. These drive systems not only provide superior torque at cutting speeds, but improved linearity, reduced vibration, and quieter operation when compared to other stepper systems popular today with benchtop CNC manufacturers.
Options and Accessories: PCNC 770 Benchtop CNC Mill
The PCNC 770 personal benchtop CNC mill design is modular, meaning each machine is expandable and upgradeable with the latest options and accessories from Tormach.
Tormach offers the PCNC 770 personal CNC milling machines on an a la carte basis, making it easy to build a truly custom CNC benchtop milling system. All options and accessories are sold separately, allowing you to choose exactly what you want. Options for PCNC 770 benchtop CNC systems include:
We also offer a complete line of CAD/CAM software and benchtop CNC milling accessories for the PCNC 770, including our Tormach Tooling System® (TTS) - the new standard in affordable toolholders for small CNC mills.
Support: PCNC 770 Benchtop CNC Mill
As with all Tormach products, PCNC 770 benchtop mills are backed with Tormach's second-to-none customer care and technical support to ensure your satisfaction. We support your investment with email and phone support from our dedicated support team of machinists and engineers and with our extensive online resources, so you can rest assured that when you choose Tormach, you’ve made the right choice from day one.
Learn More: PCNC 770 Benchtop CNC Mill
Learn more about the engineering behind the Tormach PCNC 770 personal benchtop CNC mills from our Personal CNC Design Analysis whitepaper, or review the manuals, specifications and technical documents below.
Find out more about Tormach, the latest news and upcoming events, or read the Tormach story to learn more about Tormach’s affordable line of PCNC Personal milling machines and start enabling your ideas with Tormach!
If you prefer something slightly larger than a benchtop CNC milling machine, consider our best-selling Tomach PCNC 1100 personal CNC mill.
Visit our e-store to select the personal CNC milling machine and accessories that are right for you!PCNC 770 - Mill Documents
All PCNC 770 - Mill Documents
Certificate of Inspection used for the PCNC 770 mill.
Datasheet for the Tormach PCNC 770 Series 3 and Accessories
Manual for the Tormach PCNC 770 Series 3
Exploded Parts View for the Tormach PCNC 770 Series 3
Manual for the PCNC 770 Series I
PCNC 770 Machine Package Datasheet
Service Bulletin on servicing spindle bearings on the PCNC.
Service Bulletin on flushing the lubrication system.
Extended Warranty Datasheet for the PCNC 770 mill.
PCNC 770 vs. PCNC 1100.
Regular Warranty Policy for the PCNC mills.
PCNC 770 base drawing, detailed and dimensioned. Provided to assist people planning their machine stand.
Document showing the PCNC 770 height and width for space planning.
Service Bulletin with suggestions on Oil & Coolant for the PCNC 1100 mill.
Datasheet on the optional USB Bulkhead Cable assembly for PCNC 1100 and PCNC 770 mills.
Datasheet on the Guard Kit and Extended Guard for the PCNC 1100 mill
Datasheet on the optional Machine Arm for PCNC mills.
Datasheet on the USB Jogging Pendent.
Detailed list of input and output pins on the printer port on the PCNC 1100 and PCNC 770 mills.
Detailed Engineering document of the technical design of the PCNC 1100 milling machine.
PCNC 770 - Mill Manuals
Manual for the Tormach PCNC 770 Series 3
Exploded Parts View for the Tormach PCNC 770 Series 3
Manual for the PCNC 770 Series I
PCNC 770 - Mill Datasheets
Datasheet for the Tormach PCNC 770 Series 3 and Accessories
PCNC 770 Machine Package Datasheet
Extended Warranty Datasheet for the PCNC 770 mill.
Datasheet on the optional USB Bulkhead Cable assembly for PCNC 1100 and PCNC 770 mills.
Datasheet on the Guard Kit and Extended Guard for the PCNC 1100 mill
Datasheet on the optional Machine Arm for PCNC mills.
Datasheet on the USB Jogging Pendent.
PCNC 770 - Mill Technical Documents
Certificate of Inspection used for the PCNC 770 mill.
PCNC 770 vs. PCNC 1100.
Detailed list of input and output pins on the printer port on the PCNC 1100 and PCNC 770 mills.
Detailed Engineering document of the technical design of the PCNC 1100 milling machine.
PCNC 770 - Mill Drawings
PCNC 770 base drawing, detailed and dimensioned. Provided to assist people planning their machine stand.
Document showing the PCNC 770 height and width for space planning.
PCNC 770 - Mill Service Bulletins
Service Bulletin on servicing spindle bearings on the PCNC.
Service Bulletin on flushing the lubrication system.
Service Bulletin with suggestions on Oil & Coolant for the PCNC 1100 mill.
PCNC 770 - Mill General Policies
Regular Warranty Policy for the PCNC mills.