Side by side

Denso LPH040A1 vs Epson G6-451

Two scara arms a buyer shopping for assembly and screwdriving would honestly weigh against each other, with the manufacturer-published figures in one table and a plain reading of what the differences mean on a floor. We sell across brands, so we have no reason to tilt it.

	Denso LPH040A1	Epson G6-451
Class	SCARA arm	SCARA arm
Payload	3 kg (7 lb)	3 kg (7 lb)
Reach	400 mm	450 mm
Sold as collaborative	no	no
Applications listed	pick and place, assembly and screwdriving	pick and place, assembly and screwdriving, packaging
Specs checked	2026-08-22	2026-08-23

Every figure is a manufacturer-published claim, checked on the date shown against the maker's own material, and not one of them survives contact with your part, your rate and your floor without an applications review. Prices are deliberately absent: quotes are prepared by our team and confirmed with the manufacturer.

What the numbers mean on the floor

Payload is effectively a tie at 3 kg and 3 kg. The gripper and the part decide it, not the arm: rated payload is measured at the wrist with no tool on it.
The Epson G6-451 reaches 50 mm farther than the Denso LPH040A1. That matters for pallet height, bin depth and machine door clearance more than it matters at a bench.
Neither is sold as collaborative. Both need guarding and an integrator's risk assessment before a person shares the floor with them.
Both are listed for assembly and screwdriving, pick and place. The Epson G6-451 is also listed for packaging.

What a spec sheet cannot tell you

The gripper, the fixture and the integrator decide more of the outcome than the arm. Cycle time on your part is a test, not a datasheet figure. Service footprint, spare parts and who answers the phone at 2 AM differ by brand and by state. And the price difference between two arms in the same class is usually smaller than the difference between two integrators' quotes for the same cell. A model number is not a specification, and the gripper is the project.

From our matrix

Denso LPH040A1. Standard cycle 0.45 s. Light payload class.

Epson G6-451. Legacy, superseded by the GX8. RATED 3 kg, max 6 kg. Cycle 0.33 s. IP54 and IP65 variants exist.

Also on the shortlist for assembly and screwdriving

Ask about these two for your job

Free, about two minutes, no phone number. Joe will tell you which belongs on your shortlist, what beats both, and what has to be true for the math to work.