Operating-weight guide

Attachments for the Kubota U18-5 weight range

Bucket line: GP - general purpose digging bucket250–600 mm wide

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Catalogue sizes for the U18-5

Each size below has a catalogue row rated for a carrier of 1,760 kg operating weight. Tell us which sizes you want and we reply with an offer.

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Attachment	Sizes	Capacity [dm³]	Width [mm]	Weight [kg]
GP - general purpose digging bucket	GP-20 · 5 width variants	21–61 SAE	250–600	22–47
GB - rigid grading & ditching bucket, German profile	GB-20 · 3 width variants	57–85 SAE	800–1,200	39–55
GBH - hydraulic tilt ditching bucket for mini-excavator	GBH-20 · 3 width variants	57–85 SAE	800–1,200	70–86
RGP - skeleton rod GP bucket	RGP-20	62 SAE	600	40
SGP - heavy duty skeleton GP bucket	SGP-20	50 SAE	600	49
GPO - GP bucket with perforated bottom	GPO-20 · 2 width variants	50–63 SAE	600–800	43–53
GPL - general purpose digging bucket	GPL-20 · 5 width variants	20–59 SAE	250–600	16–32
GBP - rigid grading & ditching bucket, Italian profile	GBP-20 · 3 width variants	77–121 SAE	800–1,200	44–64
GBPH - hydraulic tilting grading & ditching bucket	GBPH-20 · 3 width variants	68–94 SAE	900–1,200	76–91
RGPL - skeleton rod GPL bucket	RGPL-20	60 SAE	600	29
GPLO - GPL bucket with perforated bottom	GPLO-20 · 2 width variants	59–70 SAE	600–800	32–43
SGPL - heavy duty skeleton GPL bucket for mini-excavator	SGPL-20	60 SAE	600	39
BDP mini - clay digging bucket for mini-excavator	BDP-20	10 SAE	220	21
SB mini - Dutch profile grading & ditching bucket for mini-excavator	SB-20 · 3 width variants	77–99 SAE	800–1,000	43–53
PDP mini - skeleton BDP stone bucket	PDP-20 · 3 width variants	40–79 SAE	400–700	32–50
DS mini - Scandinavian deep digging bucket for mini-excavator	DS-20 · 4 width variants	34–89 SAE	300–600	31–52
PS mini - Scandinavian universal grading bucket for mini-excavator	PS-25 · 3 width variants	112–140 SAE	1,000–1,200	64–77
PSH mini - hydraulic swivelling grading bucket for mini-excavators	PS-25 · 3 width variants		1,000–1,200
KS mini - cable bucket for mini-excavator	KS-20 · 3 width variants	19–50 SAE	200–400	20–34
KSV mini - Scandinavian profile cable V bucket for mini-excavator	KSV-20 · 3 width variants	17–57 SAE	100–300	23–40
CB mini - hydraulic clamp bucket for mini-excavator	CBR-20	52 SAE	550	65
GKB mini - deep cable digging bucket for mini-excavator	GKB-30		150	37
RGPR - skeleton rod bucket	RGPR-20	55 SAE	500	45
LR mini - straight land rakes for mini-excavator	LR-3 · 2 width variants		1,000–1,200	85–100
LRS - short land rakes for mini-excavators	LRS-3		925	70
RIP mini - ripper shank for mini-excavator	Ripper-2.5			21
MR mini - multi-ripper for mini-excavator	MRF 25		400	36
GRB light - mini-excavator grading beam with lowered mass	GRB-MIKRO · 3 width variants, GRBH-MIKRO · 3 width variants		1,500–2,000	86–141
RC - root cutter	Root cutter-2		170	13
RRB - root rake bucket profile	RRB-20		900	80
QC-S - S-System Scandinavian quick-coupler	QC-S30-H/150, QC-S30-H/180, QC-S30-SA/150, QC-S30-SA/180, QC-U-S30-H/150, QC-U-S30-H/180			15–42
CW - CW-System compatible quick-coupler	CW-05, CW-U-05			25–67
QC-HS / QC-MS - MS-System compatible quick-coupler	QC-HS-01, QC-MS-01, QC-U-HS-01			20–46
QC-PG - pin-grabber quick-coupler for factory brackets	QC-ML-M-30			14

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Welded to EN ISO 3834-2. Agree it as a standing term of supply and the EN 10204 3.1 certificate ships with every attachment. You also get the CE declaration of conformity for every product that carries the CE mark.

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Cite this table as https://sieruta.com/en/fit/kubota/kubota-u18-5, figures as of 2026-09-10.

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<table>
<caption>Families that fit the Kubota U18-5, with their own figures</caption>
<thead><tr><th scope="col">Attachment</th><th scope="col">Sizes</th><th scope="col">Capacity [dm³]</th><th scope="col">Width [mm]</th><th scope="col">Weight [kg]</th></tr></thead>
<tbody>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-digging/gp-general-purpose-digging-bucket">GP - general purpose digging bucket</a></td><td>GP-20 · 5 width variants</td><td>21–61 SAE</td><td>250–600</td><td>22–47</td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-grading/gb-rigid-grading-ditching-bucket">GB - rigid grading &amp; ditching bucket, German profile</a></td><td>GB-20 · 3 width variants</td><td>57–85 SAE</td><td>800–1,200</td><td>39–55</td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-grading/gbh-universal-hydraulic-tilting-ditching-bucket-for-mini-excavator">GBH - hydraulic tilt ditching bucket for mini-excavator</a></td><td>GBH-20 · 3 width variants</td><td>57–85 SAE</td><td>800–1,200</td><td>70–86</td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-skeleton/rgp-skeleton-rod-gp-bucket">RGP - skeleton rod GP bucket</a></td><td>RGP-20</td><td>62 SAE</td><td>600</td><td>40</td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-skeleton/sgp-heavy-duty-mini-excavator-skeleton-gp-bucket">SGP - heavy duty skeleton GP bucket</a></td><td>SGP-20</td><td>50 SAE</td><td>600</td><td>49</td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-skeleton/gpo-gp-bucket-with-perforated-bottom">GPO - GP bucket with perforated bottom</a></td><td>GPO-20 · 2 width variants</td><td>50–63 SAE</td><td>600–800</td><td>43–53</td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-digging/gpl-general-purpose-digging-bucket">GPL - general purpose digging bucket</a></td><td>GPL-20 · 5 width variants</td><td>20–59 SAE</td><td>250–600</td><td>16–32</td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-grading/gbp-rigid-grading-ditching-bucket">GBP - rigid grading &amp; ditching bucket, Italian profile</a></td><td>GBP-20 · 3 width variants</td><td>77–121 SAE</td><td>800–1,200</td><td>44–64</td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-grading/gbph-hydraulic-tilting-grading-ditching-bucket">GBPH - hydraulic tilting grading &amp; ditching bucket</a></td><td>GBPH-20 · 3 width variants</td><td>68–94 SAE</td><td>900–1,200</td><td>76–91</td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-skeleton/rgpl-skeleton-rod-gpl-bucket">RGPL - skeleton rod GPL bucket</a></td><td>RGPL-20</td><td>60 SAE</td><td>600</td><td>29</td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-skeleton/gplo-gpl-bucket-with-perforated-bottom">GPLO - GPL bucket with perforated bottom</a></td><td>GPLO-20 · 2 width variants</td><td>59–70 SAE</td><td>600–800</td><td>32–43</td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-skeleton/sgpl-heavy-duty-skeleton-gpl-bucket">SGPL - heavy duty skeleton GPL bucket for mini-excavator</a></td><td>SGPL-20</td><td>60 SAE</td><td>600</td><td>39</td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-digging/bdp-clay-bucket-for-mini-excavator">BDP mini - clay digging bucket for mini-excavator</a></td><td>BDP-20</td><td>10 SAE</td><td>220</td><td>21</td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-grading/sb-dutch-profile-ditch-cleaning-bucket">SB mini - Dutch profile grading &amp; ditching bucket for mini-excavator</a></td><td>SB-20 · 3 width variants</td><td>77–99 SAE</td><td>800–1,000</td><td>43–53</td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-skeleton/pdp-dutch-profile-skeleton-stone-bucket">PDP mini - skeleton BDP stone bucket</a></td><td>PDP-20 · 3 width variants</td><td>40–79 SAE</td><td>400–700</td><td>32–50</td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-digging/ds-scandinavian-deep-excavation-bucket-djupskopa">DS mini - Scandinavian deep digging bucket for mini-excavator</a></td><td>DS-20 · 4 width variants</td><td>34–89 SAE</td><td>300–600</td><td>31–52</td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-grading/ps-mini-scandinavian-universal-grading-bucket-for-mini-excavator">PS mini - Scandinavian universal grading bucket for mini-excavator</a></td><td>PS-25 · 3 width variants</td><td>112–140 SAE</td><td>1,000–1,200</td><td>64–77</td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-grading/psh-mini-hydraulic-swivelling-grading-bucket-for-mini-excavator">PSH mini - hydraulic swivelling grading bucket for mini-excavators</a></td><td>PS-25 · 3 width variants</td><td></td><td>1,000–1,200</td><td></td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-digging/ks-mini-cable-bucket-for-mini-excavator">KS mini - cable bucket for mini-excavator</a></td><td>KS-20 · 3 width variants</td><td>19–50 SAE</td><td>200–400</td><td>20–34</td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-digging/ksv-mini-scandinavian-profile-cable-v-bucket-for-mini-excavator">KSV mini - Scandinavian profile cable V bucket for mini-excavator</a></td><td>KSV-20 · 3 width variants</td><td>17–57 SAE</td><td>100–300</td><td>23–40</td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-digging/cb-hydraulic-clamp-bucket-for-mini-excavator">CB mini - hydraulic clamp bucket for mini-excavator</a></td><td>CBR-20</td><td>52 SAE</td><td>550</td><td>65</td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-digging/gkb-mini-deep-cable-digging-bucket-for-mini-excavator">GKB mini - deep cable digging bucket for mini-excavator</a></td><td>GKB-30</td><td></td><td>150</td><td>37</td></tr>
<tr><td><a href="https://sieruta.com/en/products/buckets/mini-excavator-skeleton/rgpr-skeleton-rod-bucket">RGPR - skeleton rod bucket</a></td><td>RGPR-20</td><td>55 SAE</td><td>500</td><td>45</td></tr>
<tr><td><a href="https://sieruta.com/en/products/tools/rippers-rakes/lr-mini-straight-land-rakes-for-mini-excavator">LR mini - straight land rakes for mini-excavator</a></td><td>LR-3 · 2 width variants</td><td></td><td>1,000–1,200</td><td>85–100</td></tr>
<tr><td><a href="https://sieruta.com/en/products/tools/rippers-rakes/lrs-short-land-rakes-for-mini-excavators">LRS - short land rakes for mini-excavators</a></td><td>LRS-3</td><td></td><td>925</td><td>70</td></tr>
<tr><td><a href="https://sieruta.com/en/products/tools/rippers-rakes/rip-mini-ripper-for-mini-excavator">RIP mini - ripper shank for mini-excavator</a></td><td>Ripper-2.5</td><td></td><td></td><td>21</td></tr>
<tr><td><a href="https://sieruta.com/en/products/tools/rippers-rakes/mr-mini-multi-ripper-for-mini-excavator">MR mini - multi-ripper for mini-excavator</a></td><td>MRF 25</td><td></td><td>400</td><td>36</td></tr>
<tr><td><a href="https://sieruta.com/en/products/tools/grading-beams/grb-light-mini-excavator-grading-beam-with-lowered-mass">GRB light - mini-excavator grading beam with lowered mass</a></td><td>GRB-MIKRO · 3 width variants, GRBH-MIKRO · 3 width variants</td><td></td><td>1,500–2,000</td><td>86–141</td></tr>
<tr><td><a href="https://sieruta.com/en/products/tools/rippers-rakes/rc-root-cutter">RC - root cutter</a></td><td>Root cutter-2</td><td></td><td>170</td><td>13</td></tr>
<tr><td><a href="https://sieruta.com/en/products/tools/rippers-rakes/rr-root-rake-bucket-profile">RRB - root rake bucket profile</a></td><td>RRB-20</td><td></td><td>900</td><td>80</td></tr>
<tr><td><a href="https://sieruta.com/en/products/quick-couplers/s-system/s-system-scandinavian-quick-coupler">QC-S - S-System Scandinavian quick-coupler</a></td><td>QC-S30-H/150, QC-S30-H/180, QC-S30-SA/150, QC-S30-SA/180, QC-U-S30-H/150, QC-U-S30-H/180</td><td></td><td></td><td>15–42</td></tr>
<tr><td><a href="https://sieruta.com/en/products/quick-couplers/cw-system/cw-system-quick-coupler">CW - CW-System compatible quick-coupler</a></td><td>CW-05, CW-U-05</td><td></td><td></td><td>25–67</td></tr>
<tr><td><a href="https://sieruta.com/en/products/quick-couplers/ms-system/ms-system-quick-coupler">QC-HS / QC-MS - MS-System compatible quick-coupler</a></td><td>QC-HS-01, QC-MS-01, QC-U-HS-01</td><td></td><td></td><td>20–46</td></tr>
<tr><td><a href="https://sieruta.com/en/products/quick-couplers/pin-grabber/pin-grabber-quick-coupler">QC-PG - pin-grabber quick-coupler for factory brackets</a></td><td>QC-ML-M-30</td><td></td><td></td><td>14</td></tr>
</tbody>
</table>
<p>Figures from <a href="https://sieruta.com/en/fit/kubota/kubota-u18-5">https://sieruta.com/en/fit/kubota/kubota-u18-5</a>, as of 2026-09-10.</p>

Sizes are matched to the published operating weight of the U18-5.

Weight Class: Mini Excavator (1–6 t)
Operating Weight: 1,760 kg

Family-owned group, founded in 1996
More than 50,000 attachments delivered
Built in our own factory in Poland

Hydraulics for tilt / grab / rotator

Auxiliary flow: 27.7 l/min

Source Kubota specification, accessed 2026-09-27 View source

Operating weight as published by Kubota, retrieved 2026-09-10. Source

No open-licence photo of this machine exists. The drawing shows the type (excavator, Mini 1–6 t), not this machine.

Start here

The attachments buyers in your market ask for first, sized for the U18-5.

Which coupler is on your machine?

Pick the system on your machine and we put it in your enquiry. We check the bracket before we send the quote.

How to measure your coupler

Not sure which system it is? Three measurements tell us which bracket you need.

Measure the diameter of both pins.
Measure the distance between the pin centres.
Measure the width between the inside faces of the ears.

If the coupler has a make or type printed on it, send that too.

Send me the spec sheet for my machine

Pick a bucket line and we email you its spec sheet, with the sizes we build for the U18-5.

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Bucket line

Link

Machine, line and sizes

Kubota U18-5: GP - general purpose digging bucket (GP-20)

U18-5 at a glance

Figure	Value	Source
Max dig depth	2,440 mm	maker's website (ke.kubota-eu.com)
Arm length	1,100 mm	maker's document (ke.kubota-eu.com)
Auxiliary flow	27.7 l/min	maker's website (ke.kubota-eu.com)
Auxiliary pressure	216 bar	maker's document (ke.kubota-eu.com)
Bucket capacity	0.035 m³	maker's document (ke.kubota-eu.com)
Bucket width	452 mm	maker's document (ke.kubota-eu.com)

Only figures the maker publishes for this model. Where a figure is missing, no value is shown.

What the U18-5 figures mean for its attachments

Its auxiliary circuit is rated at 27.7 l/min and 216 bar. A breaker, auger, tilt rotator or other hydraulic tool states the oil flow it needs, so choose one whose range includes this figure.
It digs down to 2,440 mm. That is the deepest trench it can open.
Its arm is 1,100 mm long.
Kubota lists a 452 mm wide bucket for this machine. Compare that with the bucket widths in the table above.
Kubota lists a bucket capacity of 0.035 m³.
Bucket breakout force is 14.7 kN and arm crowd force 7.7 kN. That is the force a bucket or ripper works with at the tooth.
Engine power is 11.8 kW.

Figures as published by Kubota in its own documents.

How the U18-5 compares with its neighbours

The nearest models by weight, with the difference to the U18-5 in parentheses where both makers publish the figure.

Model	Operating weight	Max dig depth	Auxiliary flow
U18-5	1.76 t	2,440 mm	27.7 l/min
Kubota KX019-4 LPG	1.775 t (+0.015 t)	not published	27.7 l/min
Kubota U17-5	1.705 t (-0.055 t)	2,290 mm (-150)	27.7 l/min
Komatsu PC17R-5	1.755 t (-0.005 t)	2,300 mm (-140)	not published

Figures as each maker publishes them. A difference is shown only where both machines have a published value.

U18-5: what the brochure names

Features Kubota names in its own brochure for the U18-5. Some of them may be optional, so check the machine's spec before you order.

Automatic engine idle when the controls are left alone.
A dozer blade.
Operator protection certified to ROPS and FOPS.
Two-speed travel.

From Kubota's published brochure. We keep the source document on file.

Questions about the U18-5

What bucket width fits the U18-5?: Kubota lists a 452 mm wide bucket for it. Compare that with the sizes above.
Can the U18-5 run a hydraulic attachment?: Yes, if the tool's rated range covers the auxiliary circuit: 27.7 l/min at 216 bar.

Buckets Tools Quick couplers

Bucket sets for this machine

Sets of one bucket profile that include buckets listed for the Kubota U18-5. Each set lists the buckets that match the machine's operating weight.

German-profile set
Buckets in the set for this weight: GP, GB, GBH
Italian-profile set
Buckets in the set for this weight: GPL, GBP, GBPH
Nordic-profile set
Buckets in the set for this weight: DS, PS, PSH, KS, KSV
Dutch-profile set
Buckets in the set for this weight: BDP, SB, PDP

Kubota U18-5: machine data

Operating weight: 1,760 kg
Engine power: 11.8 kW
Maximum digging depth: 2,440 mm
Bucket breakout force: 14.7 kN
Arm crowd force: 7.7 kN
Auxiliary circuit flow: 27.7 l/min
Auxiliary circuit pressure: 216 bar

As published by Kubota, retrieved 2026-09-27. Source

Before you order: check the interface

The weight class of the Kubota U18-5 sizes the attachment. It does not tell you the pin diameter, the pin spacing or the stick width, and those decide whether an attachment fits. Measure them on the machine, or send us the measurements of the bucket it runs today.

On a mini excavator the weight of the attachment counts for more than on a larger machine, because every kilogram of bucket is taken from lift capacity and stability. A narrow trenching bucket and a wide grading bucket are the usual pair, and many machines run a small quick coupler to change between them.

Quick coupler brackets at this weight

In our model tables, the attachments listed for the Kubota U18-5 at its weight are built with these brackets. Each code opens the models that list it.

Measure the diameter of both bucket pins.
Measure the distance between the pin centres.
Measure the inside width between the stick ears.
If the machine runs a quick coupler, note its make and type.

What these terms mean:

How to choose an attachment for the job:

Other Kubota models of a similar weight

Other makes of a similar weight

Operating weight within 2 t of the Kubota U18-5.

Other Kubota models with the same coupler brackets

Our model tables give these machines the same quick coupler brackets.

Why buy from the factory

Cutting, machining, welding and painting on one site, our own factory in Poland, EU
More than 50,000 attachments delivered since 2008
A record for every serial number, so the spare parts match your attachment

Need Custom Specifications?

We can manufacture attachments to your exact pin spacing and requirements for Kubota U18-5.

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Machine makes and model names belong to their owners. Sieruta is not affiliated with them. We use the names only to show which machines we offer attachments for, by operating weight.

Attachments for the Kubota U18-5 weight range

Catalogue sizes for the U18-5

Hydraulics for tilt / grab / rotator

Start here

Which coupler is on your machine?

Send me the spec sheet for my machine

Send this answer to a colleague or dealer

U18-5 at a glance

What the U18-5 figures mean for its attachments

How the U18-5 compares with its neighbours

U18-5: what the brochure names

Questions about the U18-5

Filters

Buckets

Standard mini-ex buckets set No. 1

Standard mini-ex buckets set No. 2

Dutch mini-ex buckets set No. 3

Nordic mini-ex buckets set No. 4

Special use mini-ex buckets

Tools

Other mini-ex attachments

Also available

Quick couplers