Key Features
Repeatable Angle CutsThe stop system and locking positions help you set common angles fast and come back to them accurately. That matters when you are knocking out the same crosscuts over and over instead of checking every piece twice. Built for HK and HKC SawsThis Festool cross cutting guide rail connects to compatible saws with a quick fastener to create a guided crosscut system. You get portable saw-and-rail control without dragging out a full miter saw setup. Spring Return ActionThe integrated rubber spring brings the saw back to the starting position after the cut. It keeps the workflow smoother and speeds up repeated trimming, framing, and finish crosscuts.
Overview
The Festool 769943 FSK 670 Cross Cutting Guide Rail is a guide rail accessory built for fast, accurate crosscuts and angled cuts with compatible Festool saws. This is a cross cutting guide rail designed for guided crosscutting and miter work in sheet goods, trim, and jobsite lumber. Model Number: 769943. If you want the control of a guided system without setting up a stationary saw every time, this is the part that makes that workflow practical.
The big story here is repeatability. Festool built the FSK 670 with an adjustable stop, preset locking positions for common angles, and an angular range of -60 degrees to +60 degrees. In plain terms, that means you can set your angle, make the cut, and go right back to that setting for the next piece. That is what saves time on trim, framing, panel breakdown, and any job where matching parts matters more than one perfect cut.
The 26-3/8 inch cutting length gives this guide rail useful range for real crosscut work while still staying portable. It is long enough for wider stock and panel work, but it is still manageable on a bench, on sawhorses, or on the floor when the jobsite is tight. For contractors who move from room to room or from shop to site, that balance of reach and portability is the whole point.
Festool also added an integrated retract function with a rubber spring that automatically returns the saw to the start position after the cut. That sounds simple, but on repeated cuts it makes a difference. Instead of manually pulling the saw back each time, the system resets itself and keeps your rhythm moving. Combined with the quick fastener connection between saw and rail, the setup feels more like a single guided cutting tool than a loose accessory.
On cut quality, the splinter guard helps reduce tear-out for cleaner edges, and the adhesive cushion strip helps protect the workpiece surface from getting marked up. The slideway lining is there for smoother saw travel along the rail, which helps the cut feel controlled instead of grabby. Those details matter if you are working with finish material, coated panels, or anything you do not want to scar during setup.
Compatibility is a major buying point with this accessory. Festool lists it as suitable for the HKC 55, HK 55, TS 60 K, and TSV 60 K. It is specifically made to connect with compatible Festool saws as part of the guide system, not as a universal rail for every saw in the trailer. Tool Nut also notes that it cannot be used with Festool TS 55, TSC 55, or TS 75 plunge saws, which is worth knowing before you order.
Build-wise, supplementary web data lists steel and aluminum construction, which fits what you would expect from a rail that needs to stay straight, slide smoothly, and hold up on the job. At about 3.59 lbs, it is light enough to carry easily but substantial enough to stay planted when clamped. Festool also includes a 4-11/16 inch screw clamp for securing the rail to the workpiece when you need more holding power.
Who should buy it? This is for carpenters, remodelers, installers, and serious DIY users already running compatible Festool saws and looking for cleaner, faster, more repeatable crosscutting and angle cutting. If your work involves repeated cuts, trim parts, framing components, or breaking down material away from the shop, the Festool 769943 FSK 670 Cross Cutting Guide Rail earns its keep by speeding up setup and tightening up accuracy.
Set Angles Fast and Cut Them Again
This guide rail is built for the kind of work where one good angle is not enough. You need the next five or ten cuts to match it, and that is where the stop system and angle settings pay off.
- Angular range runs from -60 degrees to +60 degrees
- Locking positions help speed up setup at common cut angles
- Stop system supports repeat-accurate angled crosscuts
Portable Crosscut Control Without the Bulk
If a full stationary miter saw is overkill for the job, this system gives you guided circular saw accuracy in a smaller package. It is a good fit for punch work, installs, and mobile cutting stations.
- Cutting length is 26-3/8 in. (670 mm)
- Weight is about 3.59 lbs (1.6 kg)
- Quick fastener connection helps create a stable saw-and-rail unit
Cleaner Cuts, Smoother Travel, Less Rework
The rail is not just there to guide the saw. It also helps protect the cut and the material, which is a big deal when you are working with finished surfaces or visible trim parts.
- Splinter guard helps support cleaner cut edges
- Adhesive cushion strip helps protect the workpiece surface
- Slideway lining helps the saw move more smoothly along the rail
What’s in the Box
- (1) Festool FSK 670 Cross Cutting Guide Rail
- (1) Screw Clamp, 4-11/16 in.
Key Specifications
| Cutting Length | 26-3/8 in. (670 mm) |
|---|---|
| Angular Range | -60° to +60° |
| Weight | 3.59 lbs (1.6 kg) |
| Material | Steel and Aluminum |
| Accessory Type | Cross Cutting Guide Rail |
| Made In | Germany |
Compatibility
Compatible Festool Saws Suitable for Festool HKC 55, HK 55, TS 60 K, and TSV 60 K according to Festool accessory data. Connection Method The saw connects to the rail by means of a quick fastener to form a guided cutting unit. Not for These Saws Tool Nut notes this rail cannot be used with Festool TS 55, TSC 55, or TS 75 plunge saws.
Built For
CarpentryRemodelingFinish TrimCrosscuttingMiter CutsPanel BreakdownJobsite CuttingSerious DIY / Hobbyist
Pro Tip
If you are making a run of matching angle cuts, clamp the rail once, use the locking position or stop setting, and let the spring return bring the saw back after each cut. That setup is where the FSK system saves real time compared to measuring and resetting for every piece.
Warranty & Support
3 Years Limited warranty.
Tool Nut’s Take
Tool Nut’s Take
Festool 769943 FSK 670 Cross Cutting Guide Rail for fast, repeatable crosscuts
This is the right accessory for users who want guided crosscut accuracy from a compatible Festool saw without hauling a full miter saw everywhere.
- Who it’s for: Contractors, trim guys, remodelers, and Festool users running compatible HK, HKC, TS 60 K, or TSV 60 K saws.
- Why it stands out: The angle range, stop system, and spring return make repeated crosscuts quicker and more consistent than a basic straight guide rail setup.
- Worth knowing: This is a system accessory, not a universal rail. Check your saw model first, especially if you are coming from Festool plunge saws.
Common Questions
- What kind of accessory is this? This is a cross cutting guide rail designed for guided crosscuts and angle cuts with compatible Festool saws.
- What is the cutting length? The cutting length is 26-3/8 in. (670 mm).
- What angle range does it support? The rail supports cuts from -60 degrees to +60 degrees.
- Does it return the saw to the starting position? Yes. Festool states the integrated rubber spring retract function automatically brings the saw back to the start position after sawing.
- Will it work with every Festool saw? No. Festool lists specific compatible models, and Tool Nut notes it cannot be used with TS 55, TSC 55, or TS 75 plunge saws.
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