Description
The Snap-on QJD12SL-80 ratcheting head adds a 3/8 in square drive to a J-shank interchangeable torque wrench. What sets it apart is length. Snap-on places its fastener center 3.5 in from the retaining pin, a full inch beyond the standard QJD12A-80. As a result, the drive reaches a little deeper past brackets and housings.
Spec sheet: QJD12SL-80 at 3/8 in
- Square drive: 3/8 in.
- Shank: J (0.425 in).
- Head O.D.: 1-1/4 in.
- Head depth: 9/16 in.
- Ratchet service kit: RKRF80.
- Fastener center to retaining pin: 3.5 in (QJD-SL series).
The partner listing and CAT1500i agree on the drive, shank, O.D., depth and kit. However, the Snap-on chart we checked shows no maximum working torque for the QJD12SL-80. So ask Lost in HCM for the current figure before you set the body.
What the extra inch means for your setting
Any change in head length can shift the torque at the fastener for a given wrench setting. Snap-on publishes no correction for SL heads, so follow the manual of your body. For example, Snap-on’s ControlTech wrenches have a built-in calibration factor for different head lengths. That feature helps when one electronic body runs both short and long heads. With a click body, however, confirm the method with Lost in HCM before you mix lengths on the QJD12SL-80.
Choosing among the 3/8 in ratcheting heads
| Model | Shank | Pin to fastener | O.D. / depth | Kit |
|---|---|---|---|---|
| QJD12A-80 | J | 2.50 in | 1-1/4 / 9/16 in | RKRF80 |
| QJD12SL-80 | J | 3.5 in | 1-1/4 / 9/16 in | RKRF80 |
| QYD12A-80 | Y | 3.00 in | 1-1/4 / 9/16 in | RKRF80 |
| QYD12SL-80 | Y | 4.43 in | 1-1/4 / 9/16 in | RKRF80 |
All four share the head size and the RKRF80 kit. So the choice comes down to your body shank and the reach you need. For instance, a J body that already runs the QJD12A-80 gains reach with the QJD12SL-80, and the same spare kit covers both.
Where the Snap-on QJD12SL-80 ratcheting head helps
Longer heads suit fasteners that sit behind a lip, a flange or a row of hoses. In addition, a 3/8 in drive covers many mid-size bolts on pumps, gearboxes and machine guards. Pair the head with a J body whose range fits your spec, such as the QC2I75 at 5-75 ft-lb or the QD2IN100A at 20-100 N·m. Then keep the ratchet clean, and never use the wrench to break a bolt loose.
Quote for the Snap-on QJD12SL-80 ratcheting head
Lost in HCM supplies this head and prepares quotes, while SMK Vietnam lists it. Send your body model, socket size and torque values, then request a quote from Lost in HCM. You can also compare torque wrench heads and adaptors, check torque wrenches, or contact SMK Vietnam.
SL head questions answered
How far is the drive from the pin on the QJD12SL-80?
3.5 in, per the QJD-SL series line in Snap-on’s CAT1500i.
Does the QJD12SL-80 share a service kit with the QJD12A-80?
Yes. Snap-on lists RKRF80 for both heads.
Can the QJD12SL-80 go on a Y-shank body?
No. It has a J shank, so pick the QYD12SL-80 for Y bodies.
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