can this machine sew thru heavy duty canvas or leather?

This machine is not designed for leather or heavy duty canvas. It could possibility sew through 2 layers of canvas with the correct needle but that is about as heavy as it could take. I have no problem sewing up to 3 layers of denim or 2 layers of upholstery vinyl, but heavier items could damage the machine. It is a wonderful little machine that I use 6-8 hours daily but really not designed for industrial sewing of heavy utility fabrics.

Can I use my metal bobbins in my machine or do I need to use the plastic ones?

All top load machines use plastic bobbins except for older early singers with metal bobbin case,there is a magnetic ring attached to the hook center that holds the plastic bobbin case from rattling and to slow its movement, if you use metal bobbins they become held by the magnetic transfer through the bobbin case floor (metal) and limit or restrict bobbin rotation,if you remove the magnet you can use the metal bobbins,however it will be noisey and excelarate wear on the bobbin case

does this machine have foot pedal?

It does have a foot pedal which is on the short side but I have it anchored on a wood flooring sample with double sided tape. That solves the problem of it not quite reaching the floor, and because the pedal is light as a feather it was always turned around, upside down or on it’s side when I went to step on it but not now.

can a beginner use this machine.. i am thinking about the speed

Yes - This is one of the easiest machines to use. You will get used to the foot pedal very fast to control the speed. I have given several of these machines away as presents. I also keep two of these machines at all times.They get used of leather work, quilting and wearable art such as jackets and shirts. A great machine !!!

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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SINGER® 4423 (Grey) High Speed Heavy Duty Sewing Machine with Accessory Kit | 23 stitches deliver 97 applications, 50% more power for denim and canvas, 1100 stitches/min, metal frame, 1-step buttonhole

Product ID: 1543717

Details

Brand
SINGER
Color
Grey
Global Trade Identification Number
Input Voltage
120 Volts
Is Electric
Yes
Item Weight
17.1 Pounds

⚡1100 SPM max speed

🧵23 built-in stitches, 97 applications

🛠️Heavy-duty metal frame

€ 441.88

Duties & taxes included

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Description

🧵 Sew Bold, Sew Fast — The Heavy-Duty Powerhouse for Every Maker

BUILT TO LAST - Heavy-duty metal interior frame ensures stability and durability for thick fabrics and long-term use.
ALL IN ONE KIT - Comes with essential presser feet and accessories neatly stored for a seamless sewing experience.
EFFORTLESS PRECISION - Automatic needle threader eliminates eye strain and speeds up setup, so you focus on creating.
VERSATILITY UNLEASHED - 23 built-in stitches offering 97 stitch applications to master every fabric and design style.
POWER THROUGH PROJECTS - 1100 stitches per minute for lightning-fast sewing that keeps up with your creativity.

The SINGER® 4423 Heavy Duty Sewing Machine combines a powerful 1100 SPM motor with 23 built-in stitches (97 applications) and a robust metal frame to handle everything from delicate fabrics to thick layers. Featuring an automatic needle threader, LED lighting, and a comprehensive accessory kit, it’s designed for professionals and passionate hobbyists seeking speed, versatility, and durability in one sleek grey package.

Specifications

ASIN	B003VWXZQ0
Best Sellers Rank	#2,054 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #6 in Sewing Machines
Brand	SINGER
Brand Name	SINGER
Color	Grey
Customer Reviews	4.5 out of 5 stars 21,172 Reviews
Global Trade Identification Number	00037431883018
Included Components	Included Accessories: All-Purpose Foot, Zipper Foot, Buttonhole Foot, Button Sewing Foot, Seam Ripper / Lint Brush, Quilting Guide, Needles, Bobbins, Screwdriver, Auxiliary Spool Pin, Spool Pin Felt, Soft-Sided Dust Cover.
Input Voltage	120 Volts
Is Electric	Yes
Item Dimensions D x W x H	6.25"D x 15"W x 12"H
Item Type Name	Sewing Machine
Item Weight	17.1 Pounds
Manufacturer	SINGER
Material	Plastic
Model Number	4423
Part Number	4423.CL
Power Source	Corded Electric
Product Dimensions	6.25"D x 15"W x 12"H
UPC	037431883018
Unit Count	1.0 Count
Warranty Description	25 year limited parts; 90 days full coverage.

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