Description
Where the DED77674 Disc Sits in a DED7767 Kit
The replacement pad DED77674 for render power float work fits the Dedra DED7767 alone, mounting on the machine's 390 mm hook-and-loop disc as the manual specifies, so ordering starts with confirming the machine model. Renders World stocks it in the power float and finishing sponge range as an accessory bought separately, rather than as part of the set that arrives with the machine.
The manual's packing list settles what arrives in the box: the machine, the trowel disc, a plastic disc with mesh, a sponge plate, a set of screws, a screwdriver and a set of carbon brushes. Accessory discs sit in their own section of the manual, marked as not supplied and available to order, so a machine and a full disc set are two purchases rather than one.
- Host machine: the Dedra DED7767, which is the only tool the manual's accessory list attaches this code to.
- Mounting: hook-and-loop onto the trowel disc, which is itself fitted to the spindle pin and tightened with the screw supplied.
- Order unit: one disc, listed at £17.50 each and shown as available, read from the product endpoint in August 2026.
Why Operators Order This Disc by Code
Ordering by code is the reliable route on this platform, because the working discs for the DED7767 are described differently in different places while the code stays constant. On a van that is a quick check against the back of the worn disc, and it puts the right part on the order first time.
- Named in the manufacturer's list: DED77674 appears in the manual's accessory section alongside DED77671 and DED77675, so the code can be quoted straight from Dedra's own document.
- Tool-free change-over: the working disc presses onto the trowel disc on hook-and-loop, so a swap mid-job needs nothing from the tool bag once the backing disc is on the spindle.
- A consumable, not a repair: the manual's fault table gives a worn disc as the cause of low working effectiveness and a new disc as the remedy, which keeps a spare cheaper than lost time.
- Platform geometry: the fit is set by the machine's 390 mm disc, and the manual covers no other tool — worth a look at the model plate before ordering for a hired machine.
DED77674 Fitment Data From the Dedra Manual and the Live Listing
| Property | Value |
|---|---|
| Product code (SKU) | DED77674 |
| Host machine | Dedra DED7767, per the manual's accessory list |
| Machine disc diameter | 390 mm (machine specification, not the accessory) |
| Mounting | Hook-and-loop onto the trowel disc |
| Supplied with the machine | No — listed as a separate purchase |
| Disc function | Not published — manual and live title conflict |
| Price | £17.50 each, August 2026 |
| Availability | Available, August 2026 |
| Despatch weight | 1 kg endpoint field, packaging included — not a disc specification |
Two figures behind that table belong to the machine rather than the disc, and they are what make the fitment work: the Dedra DED7767 render smoothing machine turns its 390 mm disc at 110 min⁻¹ on a 710 W motor, which is float speed rather than sander speed. The disc diameter is the row an accessory has to match, and Renders World publishes the rest of the machine data on that listing. No VAT treatment is displayed with the £17.50 figure, so none is stated here.
How to Fit the Disc and Start Work
Fitting takes a couple of minutes with the parts supplied, and following the manual's order is what keeps the head running true. Every preparation step is carried out with the machine disconnected from the supply.
- Fit the trowel disc to the spindle pin, matching the hole to the shape of the pin, then tighten it with the screw provided.
- Press the working disc onto it, where the hook-and-loop face holds it, and check it is seated evenly all the way round.
- Start the machine horizontally and clear of the surface, holding the lock-off button on the left of the main handle, then pressing the switch.
- Let it reach full speed before it touches the work, then float in semi-circular movements with the pressure matched to the task.
- Check the surface as you go, and dampen plaster that has dried too far — the manual allows it, and it keeps the pass workable.
Stance does more for control than pressure: the manual asks for feet slightly apart and the torso leaning in, so the machine's torque is absorbed by the body rather than the wrist. The Renders World guide to power float finishing techniques covers the wider sequence and the site conditions that govern it.
Keeping the Disc and the Machine in Service
Service intervals on this platform are short and easy to plan around, and keeping to them is what makes a finishing day predictable from the first elevation to the last.
- Check the disc before every start: the manual asks for serviceable working ends, and it names a worn disc as the cause of low effectiveness.
- Work in spells: permissible working conditions are S2, 15 minutes, so a run followed by a cool-down keeps the motor comfortable all day.
- Keep it dry: the manual says to avoid damp and rates the machine IP20, so external passes wait for dry conditions.
- Wear hearing protection: sound pressure is 83.4 dB(A), uncertainty 3 dB(A), determined to EN 60745-1:2009 — the pictograms in the manual make it a requirement, not a preference.
- Watch the brushes: carbon brushes are replaced below 5 mm and checked every 20 to 30 working hours, with a spare set already in the box.
Declared vibration is below 2.5 m/s² with an uncertainty of 1.5 m/s², measured to EN 60745-2-3:2011, which keeps hand-arm exposure planning straightforward on long preparation days — though the manual is clear that real exposure depends on how the tool is used.
Which DED7767 Disc to Order, and How to Confirm It
The manual and the live product titles do not agree on which working disc each accessory code carries, and where two sources conflict on the same property the safe course is to publish neither and order by code. No function is stated for this disc anywhere on this page for exactly that reason.
That divergence is a purchasing instruction rather than a footnote, and working with it costs a buyer nothing. Read the code off the disc being replaced and match it; where the order is placed by the job instead, quote the machine and the work to Renders World first, so the code on the order is the one that arrives.
- Replacing like for like: order the code printed on the worn disc — for this listing, DED77674.
- Buying a first spare: quote the DED7767 and the work in hand, and confirm the code before the order goes in.
- Ordering for a hired machine: check the model plate first, since the manual's accessory list covers the DED7767 only.
Is a DED77674 Order Right for Your Machine?
A replacement pad DED77674 for render power float work is a straightforward order where the machine matches and the code matches; the cases below cover the rest.
- You already run the DED7767: a direct fit — the disc presses onto the trowel disc already on the spindle, with no adapter in the manual's assembly sequence.
- You run another make or model: the manual documents this platform only, so confirm the geometry against that machine's own documentation before ordering.
- You need a particular disc action: confirm the code with us first, because the labels on the two separately ordered codes are the open question above.
- You are finishing a decorative topcoat: the manual's stated purpose is floating lime-gypsum plaster and removing old layers and unevenness, and a thin-coat silicone render is textured by hand, so the machine's contribution is the sound surface beneath it.
Confirm the code against the machine's model plate, then add the disc to the order beside the DED7767 plaster float it fits — the simplest way to have a spare on the van before the next finishing programme starts.
FAQ — DED77674 Fitment, Packing and Care
Which machine does the DED77674 fit?
The Dedra DED77674 pad is listed for the DED7767 render float and no other tool in the manual, mounting on hook-and-loop to the trowel disc that carries the machine's 390 mm head. Other manufacturers' floats use different geometry, so check the model plate before ordering.
Is the disc supplied with the DED7767?
No. The manual's packing list runs to the machine, trowel disc, plastic disc with mesh, sponge plate, screws, screwdriver and carbon brushes, and the accessory discs are marked as available to order separately — which is why most buyers add one to the machine order.
How does DED77674 differ from DED77675?
Both codes appear in the manual's accessory list as separate purchases, and the function labels attached to them there are not the labels carried by the live listings — two sources, one code set. Until that is settled with the manufacturer, order by the code you are replacing, or confirm the code before buying.
When should the disc be replaced?
Before every start, the manual asks for a check that the disc is not worn out, and its fault table treats low working effectiveness as a worn-disc symptom answered by a fresh one. Clearing residue after each job and storing the disc flat keeps that check quick.
Technical Documentation for the DED7767 Platform
- Dedra DED7767 instruction manual (PDF) — revision 7767.100725.V6, valid for devices manufactured after 01.01.2023.