Difference between revisions of "Chop Saw"

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m (headline formatting, moved images closer to references; updated blade cleaning link to our own writeup)
(→‎Other Machines: removed Herkules)
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== Other Machines ==
== Other Machines ==
=== Herkules KSZ 2100 ===
Our Herkules KSZ 2100 is broken and will get replaced by the above mentioned Bosch GCM 12 GDL.
|machine name=Herkules KSZ 2100
|image=Herkules KSZ 2100.JPG
|location=[[Location::Chop Saw Station|chop saw station]]
|manual=[https://www.manualslib.com/manual/1160415/Herkules-Ksz-2100.html#manual ManualsLib]
'''This tool is broken (probably an issue with the carbon brushes) but we are [https://github.com/comakingspace/do-something/issues/178 preparing to get a replacement].'''
other shortcomings:
* The work rests are crap and should be replaced by something, e.g. T-shaped wooden supports, at the proper height (see [https://github.com/comakingspace/do-something/issues/11 issue #11]).
* There is a clamping point on the right side of the blade, but when you actually put the clamp in there the motor will hit it. Could be fixed by adding a compatible hole (or simply another clamp) about 10 cm further to the right...very smart design -.-
<br clear=all>
<br clear=all>
=== Elektra Beckum KS 210 HM Plus ===
=== Elektra Beckum KS 210 HM Plus ===

Revision as of 20:20, 25 March 2020

A chop saw is an electric miter saw (BE: mitre saw) and consists of a large circular saw and a sturdy frame. Movement of the saw head is restricted by a sliding rail which can be angled both vertically and horizontally ("compound miter").

For the hand tool capable of making only horizontally angled cuts, see miter saw.


Always keep your hands clear of the blade path and use the machine's clamp and the back fence to hold your workpiece in place. Before turning on the power at all, make sure you understand how the saw head will move and double check that all restraints are properly and tightly adjusted.

Bosch GCM 12 GDL


Bosch GCM 12 GDL

Bosch GCM 12 GDL.jpg
Synonyms: sliding compound miter saw;
DE: Kappsäge, Kapp-, Zug- und
Gehrungssäge, Zugkappsäge
Type: power tool/saw
Material: wood
Used with: circular saw blades, shop vac, inclinometer
Location: chop saw station
Access Requirements: chop saw introduction
Status: available
Manual: bosch-professional.com
Tutors: Patrick
Similar (More or Less): miter saw, circular saw, table saw,
radial arm saw

Cutting Angles

Miter angle (horizontal): left/right 45°

Bevel angle (vertical): left 0-47° right 0-47°

Adjusting miter:

  • Loosen locking screw in the front
  • Pull "miter presetting lever" [12]
    • can be locked up with a locking clamp [10]
  • Move to desired angle (indents at 45°, 31,6°, 22,5°, 15°, 0°, 15°, 22,5°, 31,6°, 45°, 60°)
  • tighten locking screw [11] before cutting!

Adjusting bevel

  • Loosen the locking lever [13]
  • The saw can now be tilted up to 45° to the left
  • In order to tilt to the right (or further than 45°) the rotary knob [39] on the right needs to be turned to the desired direction.
    • if the knob is hard to turn, push the saw slightly in the other direction before turning the knob
  • Push the locking lever back down
  • Check the travel before making the cut. If necessary move the fences to clear all the parts of the saw.


Our saw is designed for saw blades measuring 305 × 30 × 1,7-2,6 mm (OD × bore × thickness).

The currently installed blade is a Bosch "expert Wood" 305 × 30 × 2.4 mm one with 72 carbide-tipped teeth.

Locking Movement Axis

Locking sliding mechanism

  • A lever [25] can be switched to restrict the sliding movement of the saw

Depth stop

  • On the right side of the saw a screw [29] can be used to adjust the depth stop of the saw.
  • The depth stop can be disengaged by switching [30]


The saw has a line laser that indicates the cutting edges (left and right). The switch for the laser can be found on the handle [60]. Please consult the manual if the laser isn't accurate anymore. There is an adjustment procedure.


Noise & Dirt

If you are not alone, ask the others whether it is okay to cut for a few minutes as they may have to interrupt their project to give you room and to protect their ears. Although the saw is not extremely loud, it is definitely startling when you are surprised by it turning on in your back!

It's advisable to hook up a shop vac for dust extraction as the passive collector bags that typically come with this kind of tool are not too efficient. Even the shop vac will let a lot of sawdust escape. The Festool shop vac fits the dust extraction.


The blade should be sharpened or replaced when it becomes dull, otherwise using it is very dangerous! Tell a manager if you are noticing any problems, e.g. increased force required to cut your workpieces or poor quality cuts.

Decreased cutting ability can also result from dirt buildup - here are some cleaning instructions.

Potential Upgrades

Other Machines

Elektra Beckum KS 210 HM Plus


Elektra Beckum KS 210 HM Plus

Synonyms: compound miter saw;
DE: Kappsäge, Kapp- und
Type: power tool/saw
Material: wood
Used with: circular saw blades, shop vac
Location: commissioning shelf wood workshop
Access Requirements: after commissioning:
chop saw introduction
Status: in commissioning
Similar (More or Less): miter saw, circular saw, table saw,
radial arm saw

Martin brought in an alternative chop saw, which needs to be commissioned before it can be used.

If we can get it set up on the same height as the other one and with the fences in one line, both chop saws could be placed pretty close to each other!

This tool is not ready for usage yet, since not all commissioning steps are completed yet. The process is not yet tracked on GitHub. Feel free to contribute to making it usable, any help is very welcome!

Task comment Status
Name the tool: Elektra Beckum KS 210 HM Plus done
Take a picture - pending
Find the manual as PDF needed for all machines - add a link to the InfoBox or comment where you could not find it pending
Documentation this page, status: in commissioning pending
Print QR-Code use the wikicrawler pending
Introduction - pending
Security Check to be done or witnessed by a manager pending
Test to be done or witnessed by a manager pending
tool's name, owner and approx. value provide to a manager for inventorization pending
Last step: make it available physically and in the wiki - then delete this template pending