SP Maskiner SP 661 LF vs SP Maskiner SP 761 LF Harvester and

Short answer

Which one fits which job?

The 661 LF is the efficiency choice where its productive DBH range covers the crop; the 761 LF earns its extra mass and demand only when larger regular stems—not occasional outliers—require it.

Published figures

Specification comparison

Different manufacturers publish different fields. A dash means the equivalent figure is not included in this guide—not zero and not necessarily unavailable.

Specification	SP Maskiner SP 661 LF	SP Maskiner SP 761 LF
Weight	~1,480 kg	—
Minimum pump capacity	200 L/min	250 L/min
Recommended working pressure	26-30 MPa	—
Feed roller opening	630 mm	—
Feed force	~38 kN	45 kN
Standard cutting diameter	700 mm	—
Optional cutting system	up to ~810 mm	—
Feed speed	up to ~7 m/s	—
Highest-productivity DBH range	~160-510 mm	—
Standard published weight	—	~1,792 kg
Cutting capacity	—	800 mm
Feed opening	—	~700 mm
Recommended optimum DBH	—	~250-500 mm depending on configuration

Decision gates

The figures that should decide this comparison

Stem-count distribution by DBH
Head payload at working reach
Continuous flow and pressure
Required feed force and delimbing duty

Commercial fit

Where each model earns its place

SP Maskiner SP 661 LF

The clearest published case for optimum over maximum: 700 mm cutting capacity, 160-510 mm best production.

Stands whose dominant DBH sits inside 160-510 mm — which covers a large share of Australian softwood plantation work
Contractors who want high feed speed on moderate stems rather than occasional very large capacity
Carriers that can sustain 200 L/min at 26-30 MPa

SP Maskiner SP 761 LF

Heavier SP head for heavy softwood, crooked hardwood and demanding processing — 800 mm capacity, 250-500 mm optimum.

Heavy softwood and crooked hardwood where feed force matters more than feed speed
Stands whose dominant DBH sits in the 250-500 mm band
Processing applications where stem form is irregular and grip is the limiting factor

Full due diligence

Open both model buyer guides

SP Maskiner

SP 661 LF

Specifications, commercial fit, ownership considerations and checks before signing.

SP Maskiner

SP 761 LF

Specifications, commercial fit, ownership considerations and checks before signing.

Do not compare these models outside the production system

The winning specification can still produce the higher whole-life cost if another machine, the landing or haulage constrains its output. Recheck the harvester heads buying guide and calculate cost per saleable unit at your contracted hours.