Description
A 26 mm hex rarely comes with a heavy spec, but when it does, a small shank cannot carry it. The Snap-on QZXM26ADP box end head covers that case. It puts a 26 mm, 12-point ring on the Z shank, the largest Snap-on size, and it locks in with dual pins.
QZXM26ADP numbers
- Opening: 26 mm, 12-point box end.
- Shank: Z (0.990 in), two pins (DP).
- Maximum recommended working torque: about 448 ft-lb, or 607 N·m.
- O.D.: 38 mm.
- Head depth: 16 mm.
- Center of hex to retaining pin: 5.75 in.
The UK brochure lists the 26 mm Z ring as QZXM26A at 5,380 in-lb, which works out to about 448 ft-lb. That matches the source listing for this dual-pin part. Even so, Lost in HCM confirms the rating for the DP version with each quote.
Z ring versus X ring at 26 mm
The X-shank QXXM26A has the same 38 mm width and 16 mm depth. However, the brochure gives it a much lower limit than the Z ring. So clearance does not decide this choice; torque does. Pick the QZXM26ADP when the 26 mm joint needs more than an X body can deliver. Otherwise, the X ring keeps the tool shorter and lighter.
Setting up the Snap-on QZXM26ADP box end head
CAT1500i lists the QD4IN800A as its Z body, reading 129 to 572 ft-lb. Its table also notes that some bodies take dual-pin heads only, and this head has dual pins. So the working window runs from 129 ft-lb up to the confirmed head limit. Set the body, drop the ring fully over the hex and pull at a steady rate. Stop at the click every time.
Heavy 26 mm joints in practice
High-torque 26 mm parts tend to appear on heavy hydraulic fittings, large adapters and special machine nuts. For example, a fitting on a press manifold may carry a firm spec yet sit in open space. The Snap-on QZXM26ADP box end head wraps the hex fully, so it resists slipping at high load. In addition, a ring cannot spread open the way a jaw can under a hard pull.
Space for a QZXM26ADP and its body
The ring itself is compact at 38 mm across. The Z body, however, measures 41-1/2 in and weighs about 11 lb. Therefore, check the swing path and your footing before the pull. Also, wipe grit off both pins, since dirt stops them from seating fully.
Sourcing the Snap-on QZXM26ADP box end head
Request a QZXM26ADP quote from Lost in HCM and state your Z body plus the torque target. Lost in HCM supplies the ring, while SMK Vietnam lists it as a partner product. For X rings and open jaws, see torque wrench heads and adaptors, or contact SMK Vietnam.
Z ring questions for the QZXM26ADP
Why choose a Z shank for a 26 mm hex?
Only for high specs. The Z ring carries far more than the X ring of the same size.
Can I use the QZXM26ADP below 129 ft-lb?
Not on the QD4IN800A, since its range starts there. For lighter specs, an X or Y ring on a smaller body works better.
What does the DP in QZXM26ADP stand for?
Dual pins. The head locks into the Z body at two points.
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