Uniweld 40A-18 Hand Cutting Torch

Name: Uniweld 40A-18 Hand Cutting Torch – Manual & Quote
Brand: Uniweld
SKU: 40A-18

A heavy-duty injector hand cutting torch for thick steel

The Uniweld H-Style 40-series hand cutting torch, here the 40A-18, is an injector cutting torch with a heavy-duty ribbed brass handle and stainless steel ball-point valves with Teflon packing. Uniweld lists head angles of 70, 90 and 180 degrees and torch lengths of 18, 21, 36 and 48 inches. All versions use the 6290 tip series and have a stated cutting capacity of 12 inches (about 305 mm).

The torch is supplied with check valves installed. Adding FB to the part number substitutes UL listed flashback arrestors for the check valves, and Uniweld states that both are field replaceable. The injector head mixer is chosen by fuel: acetylene for 40A, 40 and 40B, fuel gas for the F versions and natural gas for the N versions.

Technical specifications

Parameter	Specification
Manufacturer / series	Uniweld / H-Style hand cutting torches, 40 series
Torch type	Injector hand cutting torch
Head angles	70, 90 and 180 degrees
Handle	Heavy-duty ribbed brass
Valves	Stainless steel ball-point valves with Teflon packing
Lever position	Bottom rear
Tip series	6290
Cutting capacity	12 in
Safety device	Check valves installed; flashback arrestors available by adding FB

Part numbers

The 40A-18 is the 90 degree, 18 in version for acetylene. The full 18 in group and the longer lengths are listed below by letter code: no letter is 70 degrees, A is 90 degrees and B is 180 degrees, with F for fuel gas and N for natural gas.

Part #	Head angle	Length	Weight
40A-18 / 40-18 / 40B-18	90 / 70 / 180 deg	18 in	55 oz
40A-21 / 40-21 / 40B-21	90 / 70 / 180 deg	21 in	59 oz
40A-36 / 40-36 / 40B-36	90 / 70 / 180 deg	36 in	74 oz
40A-48 / 40-48 / 40B-48	90 / 70 / 180 deg	48 in	76 oz

Weights rise with length from 55 oz at 18 in to 76 oz at 48 in. Fuel-gas (F) and natural-gas (N) versions follow the same lengths: 40AF, 40F and 40BF for fuel gas and 40AN and 40N for natural gas, listed in the 18 and 21 inch lengths.

Selecting and setting up

Choose the length for operator distance from the heat: 36 and 48 in versions suit scrap and heavy sections. Pick the head angle for access, remembering that the 40-18 (70 degree) and 40B-18 (180 degree) variants differ only in head angle, and the injector mixer for acetylene, fuel gas or natural gas. Use tips from the 6290 series sized for the plate thickness, seat them firmly by wrench-tightening the nut, and never use tips with damaged seats or plugged holes. The instructions say to connect the green oxygen hose to the right-hand inlet and the red fuel hose to the left-hand inlet, to install torch check valves or arrestors first and to leak test with detergent solution or a water bucket.

Documents and quotation

The Uniweld operating instructions for cutting torches (all models) are attached under Datasheets & Documents; this is the manufacturer manual, not a model-specific datasheet. Related equipment is in our Oxy-Fuel Cutting Equipment category.

For a quotation, send the part number, fuel gas and quantity, and say whether check valves or flashback arrestors (FB) are wanted.

Uniweld Products is a US manufacturer of gas regulators, torches and brazing and cutting equipment, founded in 1949 and based in Fort Lauderdale, Florida. Seven Star LLC is an independent supplier in Muscat and lists Uniweld regulators and torches for workshops, maintenance teams and contractors in Oman and the GCC.

Uniweld products listed on this page

Regulators: RUH82 series single-stage and RHT80 series two-stage regulators.
Torches: the H-Style 40A-18 hand cutting torch.

Ordering Uniweld equipment: what we need

Send the full model number, the gas service, the inlet and outlet connections, the required outlet pressure and the quantity. For torches, add the tip or nozzle size and the fuel gas. We check the model against the manufacturer documents before quoting.

Frequently Asked Questions