Load model from DB in Magento 2

load_model_magento2.php

<?php
class SomeClass
{
    /**
     * @var \Magento\Catalog\Model\ResourceModel\Product
     */
    private $productResource;
    /**
     * @var \Magento\Catalog\Model\ProductFactory
     */
    private $productFactory;

    public function __construct(
        \Magento\Catalog\Model\ResourceModel\Product $productResource,
        \Magento\Catalog\Model\ProductFactory $productFactory
    )
    {
        $this->productResource = $productResource;
        $this->productFactory = $productFactory;
    }

    /**
     * @return \Magento\Catalog\Model\Product
     */
    public function getProduct()
    {
        $productId = 1;
        /** @var  $product \Magento\Catalog\Model\Product */
        $product = $this->productFactory->create();
        $this->productResource->load($product, $productId);
        
        return $product;
    }
}
?>