Attachments for the Caterpillar M320 weight range
Weight Class: Large Excavator (10–30 t) Operating Weight: 18,800 – 21,200 kg
- Bucket line
- DB - heavy duty digging bucket 600–1,400 mm wide
- We usually reply within 1 working day
- We check the fit before we send the quote
- Every offer names the dispatch week
- If a bracket we made is wrong and does not fit your machine, we replace it.
How is the attachment mounted on this machine?
Tell us what is on the machine now. It narrows the sizes we show and goes with your enquiry. It does not confirm fit: we check the bracket before we send the quote.
Ask for a price with this answer
The short version for the M320
Families to look at first
- DBF - flat-top digging bucket for quick coupler 600–1,400 mm
- GD - rigid grading & ditching bucket, 12–40 t 1,600–2,000 mm
- GDH - heavy duty hydraulic grading & ditching bucket 1,600–2,000 mm
Quick coupler brackets at this weight
- S60
- S70
- MS10
- MS21
- CW20
- CW30
- CW40
- OQ60
- OQ65
- OQ70
- M18
- M26
- SW33
- SW48
Brackets we build attachments with in this weight range. Not a confirmed fit.
Still to check
Pin diameter, pin spacing, inside width between the stick ears, and any quick coupler on the machine.
Catalogue sizes for the M320
Each size below has a catalogue row rated for a carrier of 18,800 – 21,200 kg operating weight. Tell us which sizes you want and we reply with an offer.
Each family shows its candidate models by operating-weight range.
The attachments buyers in your market ask for first, sized for the M320.
On a narrow screen the table scrolls sideways.
Buckets
| Attachment | Sizes | Heaped capacity ISO 7451 [dm³] | Width [mm] | Weight [kg] |
|---|---|---|---|---|
Digging & sorting buckets | ||||
| DB - heavy duty digging bucket | DB-190 · 5 width variants, DB-230 · 4 width variants | 374–1,164 | 600–1,400 | 350–664 |
| SDB - heavy duty skeleton DB bucket | SDB-230 · 2 width variants | 1,183–1,290 | 1,400–1,500 | 833–880 |
| DBF - flat-top digging bucket for quick coupler Start here Price & lead time Get price & lead time | DBF-190 · 5 width variants, DBF-230 · 4 width variants | 376–1,102 | 600–1,400 | 346–663 |
| RDBF - flat-top skeleton DBF bucket on rods | RDBF-190 · 3 width variants, RDBF-230 · 3 width variants | 911–1,308 | 1,200–1,500 | 563–730 |
| DSX - Nordic heavy duty digging bucket | DS-HD-190 · 3 width variants, DS-HD-250 · 3 width variants | 570–1,070 | 800–1,200 | 505–847 |
Ditching, grading, sloping buckets | ||||
| GD - rigid grading & ditching bucket, 12–40 t Start here Price & lead time Get price & lead time | GD-190 · 3 width variants, GD-230 · 3 width variants | 544–819 | 1,600–2,000 | 325–441 |
| GDH - heavy duty hydraulic grading & ditching bucket Start here Price & lead time Get price & lead time | GDH-190 · 3 width variants, GDH-230 · 3 width variants | 530–867 | 1,600–2,000 | 572–700 |
| SB - Dutch profile grading & ditching bucket | SB-190 · 4 width variants, SB-230 · 4 width variants | 731–1,176 | 1,600–2,200 | 394–622 |
| DCB - grading & ditching bucket with round profile | DCB-190 · 3 width variants, DCB-230 · 3 width variants | 535–779 | 1,600–2,000 | 298–384 |
| PS - Scandinavian universal / grading bucket | PS-190 · 4 width variants, PS-230 · 4 width variants | 937–1,570 | 1,800–2,200 | 560–834 |
| PSH - hydraulic swivelling grading bucket | PS-190 · 4 width variants, PS-230 · 4 width variants | On request | 1,800–2,200 | On request |
Special use buckets | ||||
| CB - heavy duty hydraulic clamp bucket | CBR-190, CBR-260 | 803–1,071 | 1,200 | 631–1,100 |
Tools
| Attachment | Sizes | Heaped capacity ISO 7451 [dm³] | Width [mm] | Weight [kg] |
|---|---|---|---|---|
Non-bucket attachments | ||||
| TH - hydraulic thumb for excavator | TH-19, TH-26 | 700–780 | 340–520 | |
| AC - excavator asphalt cutters | AC-30 | 165 | ||
| MR - heavy duty excavator multi-ripper | MR-22 | 1,300 | 546 | |
| RIP - heavy duty ripper | Ripper-D | 403 | ||
| DuoRIP - double ripper for root extraction | Duo-Ripper-30 | 500 | 565 | |
| GRB - excavator grading beam | GRB maxi · 6 variants | 2,500–3,000 | 357–680 | |
Quick couplers
Coupler sizes within this machine's published weight range. Not a confirmed fit.
| Attachment | Sizes | Heaped capacity ISO 7451 [dm³] | Width [mm] | Weight [kg] |
|---|---|---|---|---|
| QC-S - S-System Scandinavian quick-coupler Start here Price & lead time Get price & lead time S-System (Scandinavian) | QC-S60, QC-S70, QC-U-S60, QC-U-S70 | 115–270 | ||
| CW - CW-System compatible quick-coupler CW-System | CW-30, CW-30 S, CW-40, CW-40 S, CW-U-30, CW-U-30 S, CW-U-40, CW-U-40 S | 220–240 | ||
| QC-HS / QC-MS - MS-System compatible quick-coupler MS system | QC-HS-10, QC-HS-21, QC-MS-10, QC-MS-21, QC-U-HS-10, QC-U-HS-21 | 200–310 | ||
| QC-PG - pin-grabber quick-coupler for factory brackets Pin-grabber | QC-PG-80, QC-ML-M-60, QC-ML-M-65, QC-ML-M-70, QC-U-PG-80 | 105–400 |
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 quick coupler and hydraulic attachment. See the certificates.
Message us on WhatsApp Photos and voice notes are welcome.Before you order: check the interface
The weight class of the Caterpillar M320 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.
At this weight the choice is mostly about the material. A general purpose bucket suits soil and gravel, a reinforced bucket with thicker wear parts suits mixed ground and broken rock, and the quick coupler on the machine sets the bracket every attachment needs.
Quick coupler brackets at this weight
In our model tables, the attachments listed for the Caterpillar M320 at its weight are built with these brackets. Each code opens the models that list it.
Brackets we build attachments with in this weight range. Not a confirmed fit.
- 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:
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 M320.
Send this answer to a colleague or dealer
Caterpillar M320: DBF - flat-top digging bucket for quick coupler (DBF-190, DBF-230). Shortlisted by operating weight
Sizes are matched to the published operating weight of the M320.
- Weight Class
- Large Excavator (10–30 t)
- Operating Weight
- 18,800 – 21,200 kg
- Family-owned group, founded in 1996
- More than 50,000 attachments delivered
- Built in our own factory in Poland
Operating weight as published by Caterpillar, retrieved 2026-09-13. Source
Caterpillar M320: machine data
- Max dig depth
- 6,430 mm maker's document via zeppelin.cz
- Max reach
- 10,030 mm maker's document via zeppelin.cz
- Max dump height
- 7,250 mm maker's document via zeppelin.cz
- Arm length
- 2,500–2,900 mm maker's document via zeppelin.cz
- Main pump flow
- 306 l/min maker's document via zeppelin.cz
- Auxiliary flow
- 250 l/min maker's document via zeppelin.cz
- Auxiliary pressure
- 350 bar maker's document via zeppelin.cz
- Bucket capacity
- 0.35–1.18 m³ maker's document via zeppelin.cz
- Bucket width
- 600–1,400 mm maker's document via zeppelin.cz
- Lift capacity
- 6,850 kg maker's document via zeppelin.cz
- Quick coupler
- CW30 maker's document via zeppelin.cz
- Transport width
- 2,540 mm maker's document via zeppelin.cz
What the M320 figures mean for its attachments
- Its auxiliary circuit is rated at 250 l/min and 350 bar. A breaker, auger, tilt rotator or other hydraulic tool states the oil flow it needs, so choose one whose range includes this figure.
- The main pump delivers up to 306 l/min at 350 bar. That is the pump output of the whole machine, not the flow an attachment gets.
- Caterpillar lists this quick coupler for it: CW30. The bracket on every attachment has to match the coupler.
Coupler sizes within this machine's published weight range. Not a confirmed fit.
The attachments we build with CW30 brackets - It digs down to 6,430 mm. That is the deepest trench it can open.
- Its maximum reach is 10,030 mm.
- It dumps at up to 7,250 mm, so a truck or skip side has to sit below that height.
- Caterpillar offers arms from 2,500 to 2,900 mm. A longer arm reaches further, a shorter one handles a heavier bucket.
- Caterpillar lists buckets from 600 to 1,400 mm wide for this machine.Our sizes in that range: DB - heavy duty digging bucket (DB-190, DB-230); SDB - heavy duty skeleton DB bucket (SDB-230); DBF - flat-top digging bucket for quick coupler (DBF-190, DBF-230); RDBF - flat-top skeleton DBF bucket on rods (RDBF-190, RDBF-230); DSX - Nordic heavy duty digging bucket (DS-HD-190, DS-HD-250); CB - heavy duty hydraulic clamp bucket (CBR-190, CBR-260)
- Caterpillar lists bucket capacities from 0.35 to 1.18 m³.
- Caterpillar gives a lifting capacity of 6,850 kg. Check a heavy grab or hammer, plus its load, against the full load chart.
- For transport it measures 8,925 x 2,540 x 3,360 mm (length, width, height).
Figures as published by Caterpillar in its own documents.
How the M320 compares with its neighbours
The nearest models by weight, with the difference to the M320 in parentheses where both makers publish the figure.
| Model | Operating weight | Max dig depth | Main pump flow | Auxiliary flow |
|---|---|---|---|---|
| M320 | 18.8 t | 6,430 mm | 306 l/min | 250 l/min |
| Caterpillar M319 | 19 t (+0.2 t) | 6,140 mm (-290) | 254 l/min (-52) | 250 l/min |
| Caterpillar 317 | 18.4 t (-0.4 t) | 6,600 mm (+170) | 296 l/min (-10) | 291 l/min (+41) |
| CASE WX175E SR | 18.82 t (+0.02 t) | 5,565 mm (-865) | 260 l/min (-46) | not published |
Figures as each maker publishes them. A difference is shown only where both machines have a published value.
M320: build years and variants
Build years: 2020–2026
Variants
- M320 (2020–2026)
Years and variants as listed in the LECTURA Specs database.
M320: what the brochure names
Features Caterpillar names in its own brochure for the M320. Some of them may be optional, so check the machine's spec before you order.
- A dozer blade.
- A load-sensing hydraulic system.
From Caterpillar's published brochure. We keep the source document on file.
Other Caterpillar models of a similar weight
Other makes of a similar weight
Operating weight within 2 t of the Caterpillar M320.
Other Caterpillar 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 Caterpillar M320.
Questions about the M320
- What bucket width fits the M320?
- Caterpillar lists buckets from 600 to 1,400 mm wide for it. Pick a width in that range.
- Which quick coupler is installed on your M320?
- Caterpillar lists this coupler for it: CW30. Order attachments with the matching bracket.
- Can the M320 run a hydraulic attachment?
- Yes, if the tool's rated range covers the auxiliary circuit: 250 l/min at 350 bar.
For publishers: cite or embed this table
Cite this table as https://sieruta.com/en/fit/caterpillar/caterpillar-m320, figures as of 2026-09-13.
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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.